<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cf752-ebd6-76cc-8e44-28883e427d6e,g:0796f141-306d-4040-bc9c-41e0d0504fab-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://freshpet.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="frpt-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cf752-ecac-70a0-82f9-40c8ad31d86a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cf752-ecac-7cd5-a03b-7dc7fc94daff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cf752-ecac-70a0-82f9-40c8ad31d86a" xlink:to="loc_us-gaap_StatementTable_019cf752-ecac-7cd5-a03b-7dc7fc94daff" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cf752-ecac-780a-9a35-2eb81adbd8b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cf752-ecac-7cd5-a03b-7dc7fc94daff" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cf752-ecac-780a-9a35-2eb81adbd8b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cf752-ecac-780a-9a35-2eb81adbd8b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cf752-ecac-780a-9a35-2eb81adbd8b5" xlink:to="loc_us-gaap_EquityComponentDomain_019cf752-ecac-780a-9a35-2eb81adbd8b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cf752-ecac-7440-95d3-9fc2aa6646ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cf752-ecac-780a-9a35-2eb81adbd8b5" xlink:to="loc_us-gaap_EquityComponentDomain_019cf752-ecac-7440-95d3-9fc2aa6646ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cf752-ecac-7aa4-b180-2c7507ac5ee5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cf752-ecac-7440-95d3-9fc2aa6646ec" xlink:to="loc_us-gaap_CommonStockMember_019cf752-ecac-7aa4-b180-2c7507ac5ee5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019cf752-ecac-7537-974b-e0e7e35120a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cf752-ecac-7440-95d3-9fc2aa6646ec" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019cf752-ecac-7537-974b-e0e7e35120a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019cf752-ecac-7ae6-a8e4-fe662c49b3cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cf752-ecac-7440-95d3-9fc2aa6646ec" xlink:to="loc_us-gaap_RetainedEarningsMember_019cf752-ecac-7ae6-a8e4-fe662c49b3cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cf752-ecac-7b70-81eb-ead21cad7c47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cf752-ecac-7440-95d3-9fc2aa6646ec" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cf752-ecac-7b70-81eb-ead21cad7c47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019cf752-ecac-74ca-9e75-d87618220de6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cf752-ecac-7440-95d3-9fc2aa6646ec" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019cf752-ecac-74ca-9e75-d87618220de6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cf752-ecac-70a0-82f9-40c8ad31d86a" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019cf752-ecac-7475-850a-14627f1adcb7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019cf752-ecac-7475-850a-14627f1adcb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cf752-ecac-777b-a8ec-b9eba80b4311" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_StockholdersEquity_019cf752-ecac-777b-a8ec-b9eba80b4311" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019cf752-ecac-7381-b300-86274ee2ea10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_TreasuryStockCommonShares_019cf752-ecac-7381-b300-86274ee2ea10" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cf752-ecac-7ff7-af0f-06796e7657c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cf752-ecac-7ff7-af0f-06796e7657c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019cf752-ecac-76e7-8a93-4db857a3f7eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019cf752-ecac-76e7-8a93-4db857a3f7eb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_019cf752-ecac-7f5b-a2e2-01af63ea1293" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings_019cf752-ecac-7f5b-a2e2-01af63ea1293" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings_019cf752-ecac-71f1-be07-e835f7c2b934" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_RestrictedStockValueSharesIssuedNetOfTaxWithholdings_019cf752-ecac-71f1-be07-e835f7c2b934" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019cf752-ecac-7994-ae9f-c7fc178f6a18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019cf752-ecac-7994-ae9f-c7fc178f6a18" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019cf752-ecac-7cc2-97e8-9d13e4c96fc1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019cf752-ecac-7cc2-97e8-9d13e4c96fc1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cf752-ecac-741b-bb67-c448e80fd6dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cf752-ecac-7e31-b0bd-108ff21e390d" xlink:to="loc_us-gaap_NetIncomeLoss_019cf752-ecac-741b-bb67-c448e80fd6dd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019cf752-ecac-76d3-ba38-ad7c9de77b9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cf752-ecac-7584-b26a-e69cba527b40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019cf752-ecac-72ab-b291-bd61f85b83f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#SummaryofSignificantAccountingPoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cf752-ecad-7d3c-80d9-130816778c04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cf752-ecad-7d3c-80d9-130816778c04" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7d64-874d-abc293a69843" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cf752-ecad-7d3c-80d9-130816778c04" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7d64-874d-abc293a69843" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7d64-874d-abc293a69843_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7d64-874d-abc293a69843" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7d64-874d-abc293a69843_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7a93-b040-da7b15470a96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7d64-874d-abc293a69843" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7a93-b040-da7b15470a96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_March2023NoteMember_019cf752-ecad-7b3e-90f9-7568062938b2" xlink:href="frpt-20260331.xsd#frpt_March2023NoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7a93-b040-da7b15470a96" xlink:to="loc_frpt_March2023NoteMember_019cf752-ecad-7b3e-90f9-7568062938b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7897-9bdc-cdcede8cd756" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cf752-ecad-7d3c-80d9-130816778c04" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7897-9bdc-cdcede8cd756" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7897-9bdc-cdcede8cd756_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7897-9bdc-cdcede8cd756" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7897-9bdc-cdcede8cd756_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7afd-b4dc-7c509d90281c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7897-9bdc-cdcede8cd756" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7afd-b4dc-7c509d90281c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7d63-82f9-ce09220939b7" xlink:href="frpt-20260331.xsd#frpt_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7afd-b4dc-7c509d90281c" xlink:to="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7d63-82f9-ce09220939b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019cf752-ecad-7464-8c5e-276df502c4a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cf752-ecad-7d3c-80d9-130816778c04" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019cf752-ecad-7464-8c5e-276df502c4a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cf752-ecad-7464-8c5e-276df502c4a8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019cf752-ecad-7464-8c5e-276df502c4a8" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cf752-ecad-7464-8c5e-276df502c4a8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cf752-ecad-7161-ac24-464a6a95b1b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019cf752-ecad-7464-8c5e-276df502c4a8" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cf752-ecad-7161-ac24-464a6a95b1b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019cf752-ecad-7a50-ab3c-f723bd7367f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cf752-ecad-7161-ac24-464a6a95b1b2" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019cf752-ecad-7a50-ab3c-f723bd7367f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cf752-ecad-7bcb-9c0f-328671cfeac7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cf752-ecad-7d3c-80d9-130816778c04" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cf752-ecad-7bcb-9c0f-328671cfeac7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cf752-ecad-7bcb-9c0f-328671cfeac7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cf752-ecad-7bcb-9c0f-328671cfeac7" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cf752-ecad-7bcb-9c0f-328671cfeac7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019cf752-ecad-76dc-a713-0b5ca2770c3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cf752-ecad-7bcb-9c0f-328671cfeac7" xlink:to="loc_us-gaap_ReceivableTypeDomain_019cf752-ecad-76dc-a713-0b5ca2770c3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_AccountsReceivableFromOnePetSpecialtyDistributorMember_019cf752-ecad-7b78-95b9-ff2d36bc661d" xlink:href="frpt-20260331.xsd#frpt_AccountsReceivableFromOnePetSpecialtyDistributorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019cf752-ecad-76dc-a713-0b5ca2770c3d" xlink:to="loc_frpt_AccountsReceivableFromOnePetSpecialtyDistributorMember_019cf752-ecad-7b78-95b9-ff2d36bc661d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019cf752-ecad-71bb-8461-542dd19c36fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019cf752-ecad-71bb-8461-542dd19c36fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019cf752-ecad-7d11-bf21-abdddfcd21ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_NumberOfReportableSegments_019cf752-ecad-7d11-bf21-abdddfcd21ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019d99b9-5e4a-725e-89dc-b325504782b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019d99b9-5e4a-725e-89dc-b325504782b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_EquityMethodInvestmentSoldPercentage_019dfdbc-999a-7438-94fe-c1f83ffd2734" xlink:href="frpt-20260331.xsd#frpt_EquityMethodInvestmentSoldPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_frpt_EquityMethodInvestmentSoldPercentage_019dfdbc-999a-7438-94fe-c1f83ffd2734" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019cf752-ecad-7954-8130-cd65ea47bdbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_EquityMethodInvestments_019cf752-ecad-7954-8130-cd65ea47bdbb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_019daf14-718b-740d-9d77-52a8b5e04933" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_019daf14-718b-740d-9d77-52a8b5e04933" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019cf752-ecad-775f-aeee-4b4bf2977564" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019cf752-ecad-775f-aeee-4b4bf2977564" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cf752-ecad-7bf9-a3c7-cc0dcbf812a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cf752-ecad-7bf9-a3c7-cc0dcbf812a1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cf752-ecad-7175-9ad2-9ba37fe1ef53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cf752-ecad-7175-9ad2-9ba37fe1ef53" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtAmortizedValue_019cf752-ecad-7c2d-b4e1-c6cd19df9295" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtAmortizedValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_ServicingAssetAtAmortizedValue_019cf752-ecad-7c2d-b4e1-c6cd19df9295" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_019cf752-ecad-7812-bf5f-f7fb5bc0c5ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_019cf752-ecad-7812-bf5f-f7fb5bc0c5ba" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ImplementationCosts_019daf19-f0ff-7567-b41d-e1becb6ab225" xlink:href="frpt-20260331.xsd#frpt_ImplementationCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cf752-ecad-7729-b09e-fe7be7f44d5f" xlink:to="loc_frpt_ImplementationCosts_019daf19-f0ff-7567-b41d-e1becb6ab225" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/SummaryofSignificantAccountingPoliciesSummaryofNetSalesbyClassofRetailerDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#SummaryofSignificantAccountingPoliciesSummaryofNetSalesbyClassofRetailerDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/SummaryofSignificantAccountingPoliciesSummaryofNetSalesbyClassofRetailerDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019cf752-ecad-7e49-875d-801b90727a96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019cf752-ecad-78e9-bed6-4935a145628d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cf752-ecad-7e49-875d-801b90727a96" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019cf752-ecad-78e9-bed6-4935a145628d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019cf752-ecad-7277-b778-833ef63119ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerSalesChannelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019cf752-ecad-78e9-bed6-4935a145628d" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019cf752-ecad-7277-b778-833ef63119ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019cf752-ecad-7277-b778-833ef63119ae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019cf752-ecad-7277-b778-833ef63119ae" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019cf752-ecad-7277-b778-833ef63119ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019cf752-ecad-7e49-b68d-e486272f88ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019cf752-ecad-7277-b778-833ef63119ae" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019cf752-ecad-7e49-b68d-e486272f88ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_SalesChannelGroceryMassInternationalAndDigitalMember_019cf752-ecad-7ffd-8de7-0a981046270f" xlink:href="frpt-20260331.xsd#frpt_SalesChannelGroceryMassInternationalAndDigitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019cf752-ecad-7e49-b68d-e486272f88ff" xlink:to="loc_frpt_SalesChannelGroceryMassInternationalAndDigitalMember_019cf752-ecad-7ffd-8de7-0a981046270f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_SalesChannelPetSpecialtyAndClubMember_019cf752-ecad-75cb-8f96-d7b4b61e7e8a" xlink:href="frpt-20260331.xsd#frpt_SalesChannelPetSpecialtyAndClubMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019cf752-ecad-7e49-b68d-e486272f88ff" xlink:to="loc_frpt_SalesChannelPetSpecialtyAndClubMember_019cf752-ecad-75cb-8f96-d7b4b61e7e8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cf752-ecad-7eac-9e35-e8f1d73567a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cf752-ecad-7e49-875d-801b90727a96" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cf752-ecad-7eac-9e35-e8f1d73567a6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/PropertyPlantandEquipmentnetSummaryofPropertyPlantandEquipmentnetDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#PropertyPlantandEquipmentnetSummaryofPropertyPlantandEquipmentnetDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/PropertyPlantandEquipmentnetSummaryofPropertyPlantandEquipmentnetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7707-bcf4-7523e60a1064" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cf752-ecad-7feb-8328-4a4d5d670cdf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7707-bcf4-7523e60a1064" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cf752-ecad-7feb-8328-4a4d5d670cdf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-763d-abe8-3c7568d02b91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cf752-ecad-7feb-8328-4a4d5d670cdf" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-763d-abe8-3c7568d02b91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-763d-abe8-3c7568d02b91_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-763d-abe8-3c7568d02b91" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-763d-abe8-3c7568d02b91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-763d-abe8-3c7568d02b91" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_RefrigerationEquipmentMember_019cf752-ecad-7f71-b4cf-3fee3dd7ec7e" xlink:href="frpt-20260331.xsd#frpt_RefrigerationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:to="loc_frpt_RefrigerationEquipmentMember_019cf752-ecad-7f71-b4cf-3fee3dd7ec7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019cf752-ecad-78e6-8d00-c2de79349dbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019cf752-ecad-78e6-8d00-c2de79349dbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandBuildingsAndImprovementsMember_019cf752-ecad-7da6-8e45-018e4a6af755" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandBuildingsAndImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:to="loc_us-gaap_LandBuildingsAndImprovementsMember_019cf752-ecad-7da6-8e45-018e4a6af755" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_FurnitureAndOfficeEquipmentMember_019cf752-ecad-7697-985e-e1ab12739ccf" xlink:href="frpt-20260331.xsd#frpt_FurnitureAndOfficeEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:to="loc_frpt_FurnitureAndOfficeEquipmentMember_019cf752-ecad-7697-985e-e1ab12739ccf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019cf752-ecad-7ce4-92ae-a35c7990c8f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019cf752-ecad-7ce4-92ae-a35c7990c8f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019cf752-ecad-708f-8ed3-864b42d44eb5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-77f7-957a-3162e665b436" xlink:to="loc_us-gaap_ConstructionInProgressMember_019cf752-ecad-708f-8ed3-864b42d44eb5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019cf752-ecad-7074-bde9-ebb7bb72a310" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7707-bcf4-7523e60a1064" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019cf752-ecad-7074-bde9-ebb7bb72a310" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019cf752-ecad-7408-bb33-100d640ec883" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7707-bcf4-7523e60a1064" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019cf752-ecad-7408-bb33-100d640ec883" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019cf752-ecad-7513-bc25-db2e92bfa168" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7707-bcf4-7523e60a1064" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019cf752-ecad-7513-bc25-db2e92bfa168" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019cf752-ecad-7d55-8bae-c337f0c38651" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7707-bcf4-7523e60a1064" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019cf752-ecad-7d55-8bae-c337f0c38651" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019cf752-ecad-7fbc-876b-12d8d10f1768" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7707-bcf4-7523e60a1064" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019cf752-ecad-7fbc-876b-12d8d10f1768" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/PropertyPlantandEquipmentnetNarrativeDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#PropertyPlantandEquipmentnetNarrativeDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/PropertyPlantandEquipmentnetNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7e2c-bbea-f8c522d18ea9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cf752-ecad-7df6-a45c-6f7cd0a5c3b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7e2c-bbea-f8c522d18ea9" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cf752-ecad-7df6-a45c-6f7cd0a5c3b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7836-88bf-a6ac17758b5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cf752-ecad-7df6-a45c-6f7cd0a5c3b3" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7836-88bf-a6ac17758b5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-7836-88bf-a6ac17758b5d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7836-88bf-a6ac17758b5d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-7836-88bf-a6ac17758b5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-7bef-9eff-63d702d0896d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7836-88bf-a6ac17758b5d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-7bef-9eff-63d702d0896d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019cf752-ecad-702d-b040-be8efd1da959" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-7bef-9eff-63d702d0896d" xlink:to="loc_us-gaap_CostOfSalesMember_019cf752-ecad-702d-b040-be8efd1da959" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019cf752-ecad-7423-8046-638ceaf99941" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cf752-ecad-7e2c-bbea-f8c522d18ea9" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019cf752-ecad-7423-8046-638ceaf99941" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/ConvertibleSeniorNotesNarrativeDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#ConvertibleSeniorNotesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/ConvertibleSeniorNotesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-7088-a621-edaeefe99d5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-7088-a621-edaeefe99d5d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7ce6-b812-cd2d4d471cc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-7088-a621-edaeefe99d5d" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7ce6-b812-cd2d4d471cc7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7ce6-b812-cd2d4d471cc7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7ce6-b812-cd2d4d471cc7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7ce6-b812-cd2d4d471cc7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7544-96e5-e18facb8de21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7ce6-b812-cd2d4d471cc7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7544-96e5-e18facb8de21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_March2023NoteMember_019cf752-ecad-71a9-96b7-182fec816757" xlink:href="frpt-20260331.xsd#frpt_March2023NoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7544-96e5-e18facb8de21" xlink:to="loc_frpt_March2023NoteMember_019cf752-ecad-71a9-96b7-182fec816757" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-76c6-8046-3e720e266541" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-7088-a621-edaeefe99d5d" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-76c6-8046-3e720e266541" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-76c6-8046-3e720e266541_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-76c6-8046-3e720e266541" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-76c6-8046-3e720e266541_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-775f-b0be-cce0044b93fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-76c6-8046-3e720e266541" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-775f-b0be-cce0044b93fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7960-a1ea-1f2a98aea488" xlink:href="frpt-20260331.xsd#frpt_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-775f-b0be-cce0044b93fc" xlink:to="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7960-a1ea-1f2a98aea488" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019cf752-ecad-76fc-839b-14d3680c0793" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionByUniqueDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-7088-a621-edaeefe99d5d" xlink:to="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019cf752-ecad-76fc-839b-14d3680c0793" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionNameDomain_019cf752-ecad-76fc-839b-14d3680c0793_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019cf752-ecad-76fc-839b-14d3680c0793" xlink:to="loc_us-gaap_DebtConversionNameDomain_019cf752-ecad-76fc-839b-14d3680c0793_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionNameDomain_019cf752-ecad-7fb3-aec8-98043331bd63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtConversionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019cf752-ecad-76fc-839b-14d3680c0793" xlink:to="loc_us-gaap_DebtConversionNameDomain_019cf752-ecad-7fb3-aec8-98043331bd63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConversionPeriodOneMember_019cf752-ecad-7ff2-be05-c4cdcc0523aa" xlink:href="frpt-20260331.xsd#frpt_ConversionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionNameDomain_019cf752-ecad-7fb3-aec8-98043331bd63" xlink:to="loc_frpt_ConversionPeriodOneMember_019cf752-ecad-7ff2-be05-c4cdcc0523aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConversionPeriodTwoMember_019cf752-ecad-7c8a-b973-b3212c067070" xlink:href="frpt-20260331.xsd#frpt_ConversionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionNameDomain_019cf752-ecad-7fb3-aec8-98043331bd63" xlink:to="loc_frpt_ConversionPeriodTwoMember_019cf752-ecad-7c8a-b973-b3212c067070" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-7738-939c-dcdfc3e78794" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-7088-a621-edaeefe99d5d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-7738-939c-dcdfc3e78794" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-7738-939c-dcdfc3e78794_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-7738-939c-dcdfc3e78794" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-7738-939c-dcdfc3e78794_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-79d0-a4fe-394159f95f4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-7738-939c-dcdfc3e78794" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-79d0-a4fe-394159f95f4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019cf752-ecad-7ec9-8c98-a7534e1bffac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-79d0-a4fe-394159f95f4e" xlink:to="loc_us-gaap_ConstructionInProgressMember_019cf752-ecad-7ec9-8c98-a7534e1bffac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_AssetsPlaceInServiceMember_019cf752-ecad-77da-9774-38228cdb8389" xlink:href="frpt-20260331.xsd#frpt_AssetsPlaceInServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-79d0-a4fe-394159f95f4e" xlink:to="loc_frpt_AssetsPlaceInServiceMember_019cf752-ecad-77da-9774-38228cdb8389" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_019cf752-ecad-72da-867c-aaa00900316b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-7088-a621-edaeefe99d5d" xlink:to="loc_srt_RestatementAxis_019cf752-ecad-72da-867c-aaa00900316b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_019cf752-ecad-72da-867c-aaa00900316b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_019cf752-ecad-72da-867c-aaa00900316b" xlink:to="loc_srt_RestatementDomain_019cf752-ecad-72da-867c-aaa00900316b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_019cf752-ecad-7316-a381-137614ef6752" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_019cf752-ecad-72da-867c-aaa00900316b" xlink:to="loc_srt_RestatementDomain_019cf752-ecad-7316-a381-137614ef6752" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_019cf752-ecad-7fb2-b037-9bc92a71ad43" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_019cf752-ecad-7316-a381-137614ef6752" xlink:to="loc_srt_RestatementAdjustmentMember_019cf752-ecad-7fb2-b037-9bc92a71ad43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019cf752-ecad-739d-ba82-aeb87d1807db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019cf752-ecad-739d-ba82-aeb87d1807db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cf752-ecad-74c6-97ba-a7d8b98d24b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cf752-ecad-74c6-97ba-a7d8b98d24b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019cf752-ecad-7bd4-b6d6-89f40fed1b55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019cf752-ecad-7bd4-b6d6-89f40fed1b55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019cf752-ecad-7b79-b47d-9c523410ceec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019cf752-ecad-7b79-b47d-9c523410ceec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019cf752-ecad-710e-83af-4416bbfb2860" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019cf752-ecad-710e-83af-4416bbfb2860" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019cf752-ecad-7f93-912c-d74a1c97c43b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019cf752-ecad-7f93-912c-d74a1c97c43b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019cf752-ecad-7268-b03c-65b5558e494c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019cf752-ecad-7268-b03c-65b5558e494c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_DebtInstrumentConvertibleThresholdConsecutiveBusinessDays_019cf752-ecad-7ff6-b1d9-be29cdc99adf" xlink:href="frpt-20260331.xsd#frpt_DebtInstrumentConvertibleThresholdConsecutiveBusinessDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_frpt_DebtInstrumentConvertibleThresholdConsecutiveBusinessDays_019cf752-ecad-7ff6-b1d9-be29cdc99adf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_DebtInstrumentConvertiblePercentageOfSharePriceAndConversionRate_019cf752-ecad-7066-ba13-7230c645f085" xlink:href="frpt-20260331.xsd#frpt_DebtInstrumentConvertiblePercentageOfSharePriceAndConversionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_frpt_DebtInstrumentConvertiblePercentageOfSharePriceAndConversionRate_019cf752-ecad-7066-ba13-7230c645f085" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019cf752-ecad-7743-a743-8eb3e33727e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019cf752-ecad-7743-a743-8eb3e33727e1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019cf752-ecad-70dc-b359-4efed80fe449" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019cf752-ecad-70dc-b359-4efed80fe449" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_DebtInstrumentConvertibleRedemptionThresholdTradingDays_019cf752-ecad-7483-b7fe-0846b4260e89" xlink:href="frpt-20260331.xsd#frpt_DebtInstrumentConvertibleRedemptionThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_frpt_DebtInstrumentConvertibleRedemptionThresholdTradingDays_019cf752-ecad-7483-b7fe-0846b4260e89" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019cf752-ecad-7123-b869-01e75552a500" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019cf752-ecad-7123-b869-01e75552a500" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_DebtInstrumentRedemptionMinimumAggregatePrincipalOutstanding_019cf752-ecad-79a9-8e35-121243294298" xlink:href="frpt-20260331.xsd#frpt_DebtInstrumentRedemptionMinimumAggregatePrincipalOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_frpt_DebtInstrumentRedemptionMinimumAggregatePrincipalOutstanding_019cf752-ecad-79a9-8e35-121243294298" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019cf752-ecad-7a26-8673-c13013ca74b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019cf752-ecad-7a26-8673-c13013ca74b6" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019cf752-ecad-73a5-b137-afdbd20fe8ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019cf752-ecad-73a5-b137-afdbd20fe8ce" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_019cf752-ecad-7169-9640-37f17651d6ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_019cf752-ecad-7169-9640-37f17651d6ed" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestCostsCapitalized_019cf752-ecad-7f4e-8619-206bb289cb46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestCostsCapitalized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-75c1-9ea5-90420587c899" xlink:to="loc_us-gaap_InterestCostsCapitalized_019cf752-ecad-7f4e-8619-206bb289cb46" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/ConvertibleSeniorNotesSummaryofCarryingValueandFairValueofConvertibleNotesDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#ConvertibleSeniorNotesSummaryofCarryingValueandFairValueofConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/ConvertibleSeniorNotesSummaryofCarryingValueandFairValueofConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7284-978c-a00464a75f57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-72d0-9994-96f1b20d79d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7284-978c-a00464a75f57" xlink:to="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-72d0-9994-96f1b20d79d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7a1c-8441-ca5b723876d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-72d0-9994-96f1b20d79d2" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7a1c-8441-ca5b723876d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7a1c-8441-ca5b723876d4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7a1c-8441-ca5b723876d4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7a1c-8441-ca5b723876d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7535-9280-7c295c9e6155" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7a1c-8441-ca5b723876d4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7535-9280-7c295c9e6155" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_March2023NoteMember_019cf752-ecad-760b-b000-131266510caa" xlink:href="frpt-20260331.xsd#frpt_March2023NoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7535-9280-7c295c9e6155" xlink:to="loc_frpt_March2023NoteMember_019cf752-ecad-760b-b000-131266510caa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-78df-8d6c-65364febdda1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-72d0-9994-96f1b20d79d2" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-78df-8d6c-65364febdda1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-78df-8d6c-65364febdda1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-78df-8d6c-65364febdda1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-78df-8d6c-65364febdda1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-71db-961f-d7f20a3879f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-78df-8d6c-65364febdda1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-71db-961f-d7f20a3879f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7da9-9f54-b615b3757a2f" xlink:href="frpt-20260331.xsd#frpt_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-71db-961f-d7f20a3879f4" xlink:to="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7da9-9f54-b615b3757a2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019daf9b-ea81-781e-8afb-2536499b086f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7284-978c-a00464a75f57" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019daf9b-ea81-781e-8afb-2536499b086f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019cf752-ecad-78ca-b79e-5c3aef292c1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7284-978c-a00464a75f57" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019cf752-ecad-78ca-b79e-5c3aef292c1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_019cf752-ecad-73b0-bf61-471da10f5e5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7284-978c-a00464a75f57" xlink:to="loc_us-gaap_DebtInstrumentFairValue_019cf752-ecad-73b0-bf61-471da10f5e5b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_019cf752-ecad-7fd4-84dc-14e60f2142f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7284-978c-a00464a75f57" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_019cf752-ecad-7fd4-84dc-14e60f2142f5" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/ConvertibleSeniorNotesSummaryofInterestExpenseDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#ConvertibleSeniorNotesSummaryofInterestExpenseDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/ConvertibleSeniorNotesSummaryofInterestExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7783-add0-8afa79ffcdec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-79ea-bc92-b7b6ba56d5db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7783-add0-8afa79ffcdec" xlink:to="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-79ea-bc92-b7b6ba56d5db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7670-a8b8-995d5d3305c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-79ea-bc92-b7b6ba56d5db" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7670-a8b8-995d5d3305c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7670-a8b8-995d5d3305c9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7670-a8b8-995d5d3305c9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7670-a8b8-995d5d3305c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7702-82d0-8df12a55b55a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7670-a8b8-995d5d3305c9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7702-82d0-8df12a55b55a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_March2023NoteMember_019cf752-ecad-725a-9a36-43cf43327f3b" xlink:href="frpt-20260331.xsd#frpt_March2023NoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7702-82d0-8df12a55b55a" xlink:to="loc_frpt_March2023NoteMember_019cf752-ecad-725a-9a36-43cf43327f3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7533-9f3d-e6248a416e59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cf752-ecad-79ea-bc92-b7b6ba56d5db" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7533-9f3d-e6248a416e59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7533-9f3d-e6248a416e59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7533-9f3d-e6248a416e59" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7533-9f3d-e6248a416e59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7d73-a201-ba42f561a937" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7533-9f3d-e6248a416e59" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7d73-a201-ba42f561a937" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7c9e-8af4-6148418b9d4f" xlink:href="frpt-20260331.xsd#frpt_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7d73-a201-ba42f561a937" xlink:to="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7c9e-8af4-6148418b9d4f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebtExcludingAmortization_019cf752-ecad-767e-b977-362fffc14d07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebtExcludingAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7783-add0-8afa79ffcdec" xlink:to="loc_us-gaap_InterestExpenseDebtExcludingAmortization_019cf752-ecad-767e-b977-362fffc14d07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019cf752-ecad-77b5-be5e-84d5e734e241" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7783-add0-8afa79ffcdec" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019cf752-ecad-77b5-be5e-84d5e734e241" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019cf752-ecad-7787-a0c4-e30dc422e7a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cf752-ecad-7783-add0-8afa79ffcdec" xlink:to="loc_us-gaap_InterestExpenseDebt_019cf752-ecad-7787-a0c4-e30dc422e7a8" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cf752-ecad-798f-b34a-bc24cebed23f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019cf752-ecad-7297-9c84-f18b7c1ed963" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cf752-ecad-798f-b34a-bc24cebed23f" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019cf752-ecad-7297-9c84-f18b7c1ed963" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cf752-ecad-70b4-af84-27dbe2dd63d1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019cf752-ecad-7297-9c84-f18b7c1ed963" xlink:to="loc_srt_RangeAxis_019cf752-ecad-70b4-af84-27dbe2dd63d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cf752-ecad-70b4-af84-27dbe2dd63d1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cf752-ecad-70b4-af84-27dbe2dd63d1" xlink:to="loc_srt_RangeMember_019cf752-ecad-70b4-af84-27dbe2dd63d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cf752-ecad-74ae-b44e-98533c6a0dbd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cf752-ecad-70b4-af84-27dbe2dd63d1" xlink:to="loc_srt_RangeMember_019cf752-ecad-74ae-b44e-98533c6a0dbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cf752-ecad-7082-94c3-24cc48e69653" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cf752-ecad-74ae-b44e-98533c6a0dbd" xlink:to="loc_srt_MinimumMember_019cf752-ecad-7082-94c3-24cc48e69653" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cf752-ecad-70fd-a84c-4d084d6752bf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cf752-ecad-74ae-b44e-98533c6a0dbd" xlink:to="loc_srt_MaximumMember_019cf752-ecad-70fd-a84c-4d084d6752bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-71b1-829d-51152f5309b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019cf752-ecad-7297-9c84-f18b7c1ed963" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-71b1-829d-51152f5309b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-71b1-829d-51152f5309b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-71b1-829d-51152f5309b3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-71b1-829d-51152f5309b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-78ed-9765-7640e95732e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cf752-ecad-71b1-829d-51152f5309b3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-78ed-9765-7640e95732e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ManufacturingEquipmentMember_019cf752-ecad-76e5-9d68-8398835fcbfd" xlink:href="frpt-20260331.xsd#frpt_ManufacturingEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-78ed-9765-7640e95732e9" xlink:to="loc_frpt_ManufacturingEquipmentMember_019cf752-ecad-76e5-9d68-8398835fcbfd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_019cf752-ecad-7575-93f5-157e9492a342" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cf752-ecad-78ed-9765-7640e95732e9" xlink:to="loc_us-gaap_LandMember_019cf752-ecad-7575-93f5-157e9492a342" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_019cf752-ecad-7a62-a6c4-6cceaa9199e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cf752-ecad-798f-b34a-bc24cebed23f" xlink:to="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_019cf752-ecad-7a62-a6c4-6cceaa9199e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_019cf752-ecad-72b9-96d2-5f1647f7111b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cf752-ecad-798f-b34a-bc24cebed23f" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_019cf752-ecad-72b9-96d2-5f1647f7111b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeaseTermOfContract1_019cf752-ecad-7092-b600-db34e468933b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeFinanceLeaseTermOfContract1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cf752-ecad-798f-b34a-bc24cebed23f" xlink:to="loc_us-gaap_LesseeFinanceLeaseTermOfContract1_019cf752-ecad-7092-b600-db34e468933b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/EquityIncentivePlansDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#EquityIncentivePlansDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/EquityIncentivePlansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cf752-ecad-7c03-8570-fa01a429c6ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cf752-ecad-7c03-8570-fa01a429c6ab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7da8-8263-e9a50a4722e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cf752-ecad-7c03-8570-fa01a429c6ab" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7da8-8263-e9a50a4722e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-7da8-8263-e9a50a4722e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7da8-8263-e9a50a4722e8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-7da8-8263-e9a50a4722e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-79f6-8345-d9ef1b1e6621" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cf752-ecad-7da8-8263-e9a50a4722e8" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-79f6-8345-d9ef1b1e6621" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019cf752-ecad-7730-99e0-f64092e8b74c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cf752-ecad-79f6-8345-d9ef1b1e6621" xlink:to="loc_us-gaap_CostOfSalesMember_019cf752-ecad-7730-99e0-f64092e8b74c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019dc329-92de-71ce-b387-27dbe2e4ec24" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cf752-ecad-7c03-8570-fa01a429c6ab" xlink:to="loc_srt_TitleOfIndividualAxis_019dc329-92de-71ce-b387-27dbe2e4ec24" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019dc329-92de-71ce-b387-27dbe2e4ec24_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019dc329-92de-71ce-b387-27dbe2e4ec24" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019dc329-92de-71ce-b387-27dbe2e4ec24_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019dc329-92de-70d4-881d-a8e2f4b74e04" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019dc329-92de-71ce-b387-27dbe2e4ec24" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019dc329-92de-70d4-881d-a8e2f4b74e04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefFinancialOfficerMember_019df143-e46e-7c25-b4f7-9037685521f8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ChiefFinancialOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019dc329-92de-70d4-881d-a8e2f4b74e04" xlink:to="loc_srt_ChiefFinancialOfficerMember_019df143-e46e-7c25-b4f7-9037685521f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7c66-b24b-98104cb058c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cf752-ecad-7c03-8570-fa01a429c6ab" xlink:to="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7c66-b24b-98104cb058c0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7c66-b24b-98104cb058c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7c66-b24b-98104cb058c0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7c66-b24b-98104cb058c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7582-bce0-b0a68e71c4dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7c66-b24b-98104cb058c0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7582-bce0-b0a68e71c4dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ServiceBasedRestrictedStockUnitsMember_019cf752-ecad-72da-a070-2808e6e3da72" xlink:href="frpt-20260331.xsd#frpt_ServiceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7582-bce0-b0a68e71c4dc" xlink:to="loc_frpt_ServiceBasedRestrictedStockUnitsMember_019cf752-ecad-72da-a070-2808e6e3da72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ServiceBasedAndPerformanceBasedStockOptionsMember_019cf752-ecad-7f83-9987-98bb67aa01ed" xlink:href="frpt-20260331.xsd#frpt_ServiceBasedAndPerformanceBasedStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7582-bce0-b0a68e71c4dc" xlink:to="loc_frpt_ServiceBasedAndPerformanceBasedStockOptionsMember_019cf752-ecad-7f83-9987-98bb67aa01ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ServiceBasedStockOptionsMember_019cf752-ecad-7a6c-81c9-30b64a874ddf" xlink:href="frpt-20260331.xsd#frpt_ServiceBasedStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_frpt_ServiceBasedAndPerformanceBasedStockOptionsMember_019cf752-ecad-7f83-9987-98bb67aa01ed" xlink:to="loc_frpt_ServiceBasedStockOptionsMember_019cf752-ecad-7a6c-81c9-30b64a874ddf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_PerformanceBasedRestrictedStockUnitsMember_019dc334-3e48-70cd-88b6-4571e5dd8d66" xlink:href="frpt-20260331.xsd#frpt_PerformanceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7582-bce0-b0a68e71c4dc" xlink:to="loc_frpt_PerformanceBasedRestrictedStockUnitsMember_019dc334-3e48-70cd-88b6-4571e5dd8d66" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_PerformanceBasedRestrictedStockUnitsWithMarketConditionMember_019df13d-168f-79a0-b161-9af2517b0141" xlink:href="frpt-20260331.xsd#frpt_PerformanceBasedRestrictedStockUnitsWithMarketConditionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7582-bce0-b0a68e71c4dc" xlink:to="loc_frpt_PerformanceBasedRestrictedStockUnitsWithMarketConditionMember_019df13d-168f-79a0-b161-9af2517b0141" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cf752-ecad-77d1-915f-3310be3c16da" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cf752-ecad-7c03-8570-fa01a429c6ab" xlink:to="loc_srt_RangeAxis_019cf752-ecad-77d1-915f-3310be3c16da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cf752-ecad-77d1-915f-3310be3c16da_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cf752-ecad-77d1-915f-3310be3c16da" xlink:to="loc_srt_RangeMember_019cf752-ecad-77d1-915f-3310be3c16da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cf752-ecad-7731-b916-7c843d57c5da" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cf752-ecad-77d1-915f-3310be3c16da" xlink:to="loc_srt_RangeMember_019cf752-ecad-7731-b916-7c843d57c5da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cf752-ecad-74ec-a7cd-6aa96f6a52ce" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cf752-ecad-7731-b916-7c843d57c5da" xlink:to="loc_srt_MinimumMember_019cf752-ecad-74ec-a7cd-6aa96f6a52ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cf752-ecad-7d14-b935-340fcee62f8e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cf752-ecad-7731-b916-7c843d57c5da" xlink:to="loc_srt_MaximumMember_019cf752-ecad-7d14-b935-340fcee62f8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cf752-ecad-7659-a2d1-63048a65e07d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cf752-ecad-7659-a2d1-63048a65e07d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cf752-ecad-72eb-a418-ee1f438d39d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019cf752-ecad-72eb-a418-ee1f438d39d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019df93a-1e52-7d87-8465-7afec885074b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019df93a-1e52-7d87-8465-7afec885074b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019cf752-ecad-7a54-ab85-e2c45f8a3513" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019cf752-ecad-7a54-ab85-e2c45f8a3513" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cf752-ecad-734a-a534-695c45f8cc9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019cf752-ecad-734a-a534-695c45f8cc9f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cf752-ecad-7453-a327-754c61c0a037" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cf752-ecad-7453-a327-754c61c0a037" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019cf752-ecad-78c3-9dc8-3984dca3f6c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019cf752-ecad-78c3-9dc8-3984dca3f6c8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_019cf752-ecad-72a5-8a79-b379ebbfa948" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_019cf752-ecad-72a5-8a79-b379ebbfa948" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesDeliveredToShareAwardedMultiplier_019cf752-ecad-7e97-89fc-8d3741bb29d4" xlink:href="frpt-20260331.xsd#frpt_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesDeliveredToShareAwardedMultiplier"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_frpt_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesDeliveredToShareAwardedMultiplier_019cf752-ecad-7e97-89fc-8d3741bb29d4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cf752-ecad-7b37-9fdb-020637914a2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cf752-ecad-7c8b-8312-46460969dbcd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019cf752-ecad-7b37-9fdb-020637914a2f" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/NetIncomeLossPerShareAttributabletoCommonStockholdersNarrativeDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#NetIncomeLossPerShareAttributabletoCommonStockholdersNarrativeDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/NetIncomeLossPerShareAttributabletoCommonStockholdersNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-723c-85bf-1064495f7904" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasicLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_019cf752-ecad-7725-8b12-f282212c3337" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-723c-85bf-1064495f7904" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_019cf752-ecad-7725-8b12-f282212c3337" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7e51-8934-defcf8f003c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_019cf752-ecad-7725-8b12-f282212c3337" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7e51-8934-defcf8f003c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7e51-8934-defcf8f003c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7e51-8934-defcf8f003c0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7e51-8934-defcf8f003c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7d20-a67d-2554b911cdde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cf752-ecad-7e51-8934-defcf8f003c0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7d20-a67d-2554b911cdde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_March2023NoteMember_019cf752-ecad-7e0e-b427-7ea49b74ffa0" xlink:href="frpt-20260331.xsd#frpt_March2023NoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cf752-ecad-7d20-a67d-2554b911cdde" xlink:to="loc_frpt_March2023NoteMember_019cf752-ecad-7e0e-b427-7ea49b74ffa0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7e23-b978-7df074653a7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_019cf752-ecad-7725-8b12-f282212c3337" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7e23-b978-7df074653a7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7e23-b978-7df074653a7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7e23-b978-7df074653a7e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-7e23-b978-7df074653a7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-75f9-a478-59444a800896" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cf752-ecad-7e23-b978-7df074653a7e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-75f9-a478-59444a800896" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7c90-8f29-699fea736c17" xlink:href="frpt-20260331.xsd#frpt_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cf752-ecad-75f9-a478-59444a800896" xlink:to="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-7c90-8f29-699fea736c17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019cf752-ecad-73e6-9c06-4d8e529361c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-723c-85bf-1064495f7904" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019cf752-ecad-73e6-9c06-4d8e529361c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_PaymentsToAcquireCappedCallOptions_019cf752-ecad-7362-9d9f-9eda80d90109" xlink:href="frpt-20260331.xsd#frpt_PaymentsToAcquireCappedCallOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-723c-85bf-1064495f7904" xlink:to="loc_frpt_PaymentsToAcquireCappedCallOptions_019cf752-ecad-7362-9d9f-9eda80d90109" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/NetIncomeLossPerShareAttributabletoCommonStockholdersSummaryofNetIncomePerShareBasicandDilutedDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#NetIncomeLossPerShareAttributabletoCommonStockholdersSummaryofNetIncomePerShareBasicandDilutedDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/NetIncomeLossPerShareAttributabletoCommonStockholdersSummaryofNetIncomePerShareBasicandDilutedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasicLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_019cf752-ecad-74d1-8149-0338606f172f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_019cf752-ecad-74d1-8149-0338606f172f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7655-a862-e5285663e3db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_019cf752-ecad-74d1-8149-0338606f172f" xlink:to="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7655-a862-e5285663e3db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7655-a862-e5285663e3db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7655-a862-e5285663e3db" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7655-a862-e5285663e3db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7de4-a387-972772121ede" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cf752-ecad-7655-a862-e5285663e3db" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7de4-a387-972772121ede" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ServicePeriodStockOptionsMember_019cf752-ecad-75c8-a878-442d99853a2b" xlink:href="frpt-20260331.xsd#frpt_ServicePeriodStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7de4-a387-972772121ede" xlink:to="loc_frpt_ServicePeriodStockOptionsMember_019cf752-ecad-75c8-a878-442d99853a2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019cf752-ecad-7386-a549-bb98855b0c3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7de4-a387-972772121ede" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019cf752-ecad-7386-a549-bb98855b0c3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_PerformanceStockOptionsMember_019cf752-ecad-71a9-aba3-e57b58e4ee9f" xlink:href="frpt-20260331.xsd#frpt_PerformanceStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7de4-a387-972772121ede" xlink:to="loc_frpt_PerformanceStockOptionsMember_019cf752-ecad-71a9-aba3-e57b58e4ee9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_019cf752-ecad-7021-b973-0d891e7d3426" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cf752-ecad-7de4-a387-972772121ede" xlink:to="loc_us-gaap_StockCompensationPlanMember_019cf752-ecad-7021-b973-0d891e7d3426" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019cf752-ecad-7226-8e23-b90226eee421" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019cf752-ecad-7226-8e23-b90226eee421" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_019cf752-ecad-796d-ad41-86c6379450b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestOnConvertibleDebtNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_019cf752-ecad-796d-ad41-86c6379450b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019cf752-ecad-7598-b3df-28639fc56a13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019cf752-ecad-7598-b3df-28639fc56a13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cf752-ecad-77d3-9be3-944e5ed8d83b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cf752-ecad-77d3-9be3-944e5ed8d83b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019cf752-ecad-7d03-9b27-95241039c9f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019cf752-ecad-7d03-9b27-95241039c9f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cf752-ecad-7167-9c24-1fbe427c32b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cf752-ecad-7167-9c24-1fbe427c32b4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019cf752-ecad-7bf7-bb6a-da6aefdf3bd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_EarningsPerShareBasic_019cf752-ecad-7bf7-bb6a-da6aefdf3bd6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019cf752-ecad-7b76-a8d8-ea39fcd7e876" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_019cf752-ecad-781b-a3e1-e3d55957c425" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019cf752-ecad-7b76-a8d8-ea39fcd7e876" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/NetIncomeLossPerShareAttributabletoCommonStockholdersSummaryofAntidilutiveSecuritiesExcludedfromComputationofEarningsLossPerShareDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#NetIncomeLossPerShareAttributabletoCommonStockholdersSummaryofAntidilutiveSecuritiesExcludedfromComputationofEarningsLossPerShareDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/NetIncomeLossPerShareAttributabletoCommonStockholdersSummaryofAntidilutiveSecuritiesExcludedfromComputationofEarningsLossPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019cf752-ecad-7cd7-9932-b450b15eed41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019cf752-ecad-71f5-9d27-86f52d9d924b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019cf752-ecad-7cd7-9932-b450b15eed41" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019cf752-ecad-71f5-9d27-86f52d9d924b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cf752-ecad-78d0-af3a-e5f132238a7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019cf752-ecad-71f5-9d27-86f52d9d924b" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cf752-ecad-78d0-af3a-e5f132238a7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-78d0-af3a-e5f132238a7f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cf752-ecad-78d0-af3a-e5f132238a7f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-78d0-af3a-e5f132238a7f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-7508-9d01-663e9deca420" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cf752-ecad-78d0-af3a-e5f132238a7f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-7508-9d01-663e9deca420" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ServicePeriodStockOptionsMember_019cf752-ecad-7764-a231-da5e698af01c" xlink:href="frpt-20260331.xsd#frpt_ServicePeriodStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-7508-9d01-663e9deca420" xlink:to="loc_frpt_ServicePeriodStockOptionsMember_019cf752-ecad-7764-a231-da5e698af01c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019cf752-ecad-72ec-aa12-7b96a394f369" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-7508-9d01-663e9deca420" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019cf752-ecad-72ec-aa12-7b96a394f369" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_PerformanceStockOptionsMember_019cf752-ecad-73be-9d20-53753e3b8ba6" xlink:href="frpt-20260331.xsd#frpt_PerformanceStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-7508-9d01-663e9deca420" xlink:to="loc_frpt_PerformanceStockOptionsMember_019cf752-ecad-73be-9d20-53753e3b8ba6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-77b5-9da4-7d98f46e748a" xlink:href="frpt-20260331.xsd#frpt_ConvertibleSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019cf752-ecad-7508-9d01-663e9deca420" xlink:to="loc_frpt_ConvertibleSeniorNotesMember_019cf752-ecad-77b5-9da4-7d98f46e748a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019cf752-ecad-7ea9-a58c-5c8c4423fbdf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019cf752-ecad-7cd7-9932-b450b15eed41" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019cf752-ecad-7ea9-a58c-5c8c4423fbdf" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/ConcentrationsDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#ConcentrationsDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/ConcentrationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019cf752-ed64-7d44-a2a1-06c9c2aad677" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019cf752-ed64-7614-8e36-f3763d10c166" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019cf752-ed64-7d44-a2a1-06c9c2aad677" xlink:to="loc_us-gaap_ConcentrationRiskTable_019cf752-ed64-7614-8e36-f3763d10c166" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019cf752-ed64-7f79-95b6-ddab0c058457" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019cf752-ed64-7614-8e36-f3763d10c166" xlink:to="loc_srt_MajorCustomersAxis_019cf752-ed64-7f79-95b6-ddab0c058457" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019cf752-ed64-7f79-95b6-ddab0c058457_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019cf752-ed64-7f79-95b6-ddab0c058457" xlink:to="loc_srt_NameOfMajorCustomerDomain_019cf752-ed64-7f79-95b6-ddab0c058457_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019cf752-ed64-7aa8-aa88-2dc4594e50e4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019cf752-ed64-7f79-95b6-ddab0c058457" xlink:to="loc_srt_NameOfMajorCustomerDomain_019cf752-ed64-7aa8-aa88-2dc4594e50e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_OneDistributorMember_019cf752-ed64-724a-9cf7-6aff0f444152" xlink:href="frpt-20260331.xsd#frpt_OneDistributorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019cf752-ed64-7aa8-aa88-2dc4594e50e4" xlink:to="loc_frpt_OneDistributorMember_019cf752-ed64-724a-9cf7-6aff0f444152" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_CustomerMember_019cf752-ed64-70e3-970f-91ff474080a1" xlink:href="frpt-20260331.xsd#frpt_CustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019cf752-ed64-7aa8-aa88-2dc4594e50e4" xlink:to="loc_frpt_CustomerMember_019cf752-ed64-70e3-970f-91ff474080a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_CustomerTwoMember_019cf752-ed64-7689-8b49-d9a92abfb9c4" xlink:href="frpt-20260331.xsd#frpt_CustomerTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019cf752-ed64-7aa8-aa88-2dc4594e50e4" xlink:to="loc_frpt_CustomerTwoMember_019cf752-ed64-7689-8b49-d9a92abfb9c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cf752-ed64-76ac-a48f-52128c55eb84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019cf752-ed64-7614-8e36-f3763d10c166" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cf752-ed64-76ac-a48f-52128c55eb84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cf752-ed64-76ac-a48f-52128c55eb84_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cf752-ed64-76ac-a48f-52128c55eb84" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cf752-ed64-76ac-a48f-52128c55eb84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cf752-ed64-7244-a57e-64db2fd3412b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019cf752-ed64-76ac-a48f-52128c55eb84" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cf752-ed64-7244-a57e-64db2fd3412b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019cf752-ed64-7b5f-b8d8-0c102715015e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cf752-ed64-7244-a57e-64db2fd3412b" xlink:to="loc_us-gaap_SalesRevenueNetMember_019cf752-ed64-7b5f-b8d8-0c102715015e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019cf752-ed64-78ff-a2da-59abee9b88a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019cf752-ed64-7244-a57e-64db2fd3412b" xlink:to="loc_us-gaap_AccountsReceivableMember_019cf752-ed64-78ff-a2da-59abee9b88a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019cf752-ed64-752a-ac89-77a3e6300c64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019cf752-ed64-7614-8e36-f3763d10c166" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019cf752-ed64-752a-ac89-77a3e6300c64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019cf752-ed64-752a-ac89-77a3e6300c64_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019cf752-ed64-752a-ac89-77a3e6300c64" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019cf752-ed64-752a-ac89-77a3e6300c64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019cf752-ed64-7014-8804-489fbc1acc55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019cf752-ed64-752a-ac89-77a3e6300c64" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019cf752-ed64-7014-8804-489fbc1acc55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019cf752-ed64-71ad-a4f0-4417959a67bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019cf752-ed64-7014-8804-489fbc1acc55" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019cf752-ed64-71ad-a4f0-4417959a67bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019cf752-ed64-7ed6-917c-f20b7fb042c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019cf752-ed64-7d44-a2a1-06c9c2aad677" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019cf752-ed64-7ed6-917c-f20b7fb042c4" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://freshpet.com/role/SegmentInformationFinancialInformationDetails" xlink:type="simple" xlink:href="frpt-20260331.xsd#SegmentInformationFinancialInformationDetails"/>
  <link:definitionLink xlink:role="http://freshpet.com/role/SegmentInformationFinancialInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019d9a26-48ca-78c3-a8e1-3e00f50e2484" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019d9a26-48ca-78c3-a8e1-3e00f50e2484" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019d9a26-48ca-775d-869b-c693843efdbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019d9a26-48ca-78c3-a8e1-3e00f50e2484" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019d9a26-48ca-775d-869b-c693843efdbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019d9a26-48ca-775d-869b-c693843efdbb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019d9a26-48ca-775d-869b-c693843efdbb" xlink:to="loc_us-gaap_SegmentDomain_019d9a26-48ca-775d-869b-c693843efdbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019d9a26-48ca-7ec2-b2a9-08fbd043fc38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019d9a26-48ca-775d-869b-c693843efdbb" xlink:to="loc_us-gaap_SegmentDomain_019d9a26-48ca-7ec2-b2a9-08fbd043fc38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ReportableSegmentMember_019d9a26-48ca-70db-9321-174589e21bc6" xlink:href="frpt-20260331.xsd#frpt_ReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019d9a26-48ca-7ec2-b2a9-08fbd043fc38" xlink:to="loc_frpt_ReportableSegmentMember_019d9a26-48ca-70db-9321-174589e21bc6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019d9a26-48ca-7934-9c60-f42049932565" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019d9a26-48ca-7934-9c60-f42049932565" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_InputCosts_019d9a26-48ca-720f-a7bf-f044714dc279" xlink:href="frpt-20260331.xsd#frpt_InputCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_frpt_InputCosts_019d9a26-48ca-720f-a7bf-f044714dc279" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_QualityCosts_019d9a26-48ca-7bb9-aff1-d754f85db9b8" xlink:href="frpt-20260331.xsd#frpt_QualityCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_frpt_QualityCosts_019d9a26-48ca-7bb9-aff1-d754f85db9b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_LogisticsCosts_019d9a26-48ca-7b4a-8597-857a6cea6671" xlink:href="frpt-20260331.xsd#frpt_LogisticsCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_frpt_LogisticsCosts_019d9a26-48ca-7b4a-8597-857a6cea6671" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_MediaCosts_019d9a26-48ca-72f7-bb88-b33ebf42b6e2" xlink:href="frpt-20260331.xsd#frpt_MediaCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_frpt_MediaCosts_019d9a26-48ca-72f7-bb88-b33ebf42b6e2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_SegmentReportingPlantCostsAndOtherSegmentCostOfGoodsSoldItemsAmount_019d9a26-48ca-71b1-abf5-de2b72fd4486" xlink:href="frpt-20260331.xsd#frpt_SegmentReportingPlantCostsAndOtherSegmentCostOfGoodsSoldItemsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_frpt_SegmentReportingPlantCostsAndOtherSegmentCostOfGoodsSoldItemsAmount_019d9a26-48ca-71b1-abf5-de2b72fd4486" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019d9a26-48ca-7e0f-a490-a7bb70bf362b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019d9a26-48ca-7e0f-a490-a7bb70bf362b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019d9a26-48ca-74b3-81f5-ade92039cdad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_DepreciationAndAmortization_019d9a26-48ca-74b3-81f5-ade92039cdad" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_frpt_ShareBasedPaymentArrangementIncludingWarrantsExpense_019d9a26-48ca-767f-b709-694387ab060a" xlink:href="frpt-20260331.xsd#frpt_ShareBasedPaymentArrangementIncludingWarrantsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_frpt_ShareBasedPaymentArrangementIncludingWarrantsExpense_019d9a26-48ca-767f-b709-694387ab060a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets_019d9a26-48ca-70b8-9b77-bcb8192e7ba4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDispositionOfAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets_019d9a26-48ca-70b8-9b77-bcb8192e7ba4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019d9a26-48ca-71fa-88f3-3a15e052c06a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019d9a26-48ca-71fa-88f3-3a15e052c06a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019d9a26-48ca-72bd-8ad0-7ab908ba3b6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019d9a26-48ca-72bd-8ad0-7ab908ba3b6e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiRealizedGain_019d9a26-48ca-7b09-97b4-09265ccf4b62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiRealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_EquitySecuritiesFvNiRealizedGain_019d9a26-48ca-7b09-97b4-09265ccf4b62" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019d9a26-48ca-7e5c-9a91-4cfb82389e42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019d9a26-48ca-7e5c-9a91-4cfb82389e42" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019d9a26-48ca-72e0-85fc-1081114cf71d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019d9a26-48ca-7ac4-9aae-00cf4b9ad655" xlink:to="loc_us-gaap_NetIncomeLoss_019d9a26-48ca-72e0-85fc-1081114cf71d" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:type="arc" order="101"/>
  </link:definitionLink>
</link:linkbase>
