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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-06-09T20:32:55.2576862+00:00 -->
<!-- Version            : 5.0.1.617 -->
<!-- Package ID         : 75ef2517635747e5957c4a0955fee5cf -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="woof_AmountsReclassifiedOutOfAccumulatedOtherComprehensiveIncomeLoss" name="AmountsReclassifiedOutOfAccumulatedOtherComprehensiveIncomeLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="woof_NonCashOperatingLeaseCosts" name="NonCashOperatingLeaseCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="woof_IncreaseDecreaseOperatingLeaseLiabilities" name="IncreaseDecreaseOperatingLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="woof_CorporateConversionAndInitialPublicOfferingPolicyTextBlock" name="CorporateConversionAndInitialPublicOfferingPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_LitigationPolicyTextBlock" name="LitigationPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_ScheduleOfCashAndCashEquivalentsAndRestrictedCashTableTextBlock" name="ScheduleOfCashAndCashEquivalentsAndRestrictedCashTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_ScheduleOfShareBasedCompensationPartnershipUnitsActivityUnderTwoThousandAndSixteenIncentivePlanTableTextBlock" name="ScheduleOfShareBasedCompensationPartnershipUnitsActivityUnderTwoThousandAndSixteenIncentivePlanTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_SummaryOfSignificantAccountingPoliciesLineItems" name="SummaryOfSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_SummaryOfSignificantAccountingPoliciesTable" name="SummaryOfSignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_ScoobyAggregatorLPMember" name="ScoobyAggregatorLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_DogAndCatFoodMember" name="DogAndCatFoodMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_SuppliesAndCompanionAnimalsMember" name="SuppliesAndCompanionAnimalsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_ServicesAndOtherMember" name="ServicesAndOtherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_SeniorSecuredTermLoanFacilityMember" name="SeniorSecuredTermLoanFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_FirstLienTermLoanMember" name="FirstLienTermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_SeniorSecuredAssetBasedRevolvingCreditFacilityMember" name="SeniorSecuredAssetBasedRevolvingCreditFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_ActualDailyUtilizedPortionExceedsFiftyPercentageMember" name="ActualDailyUtilizedPortionExceedsFiftyPercentageMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_DebtInstrumentFloorRate" name="DebtInstrumentFloorRate" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_DebtIssuanceCostRelatedToThirdPartyExpenses" name="DebtIssuanceCostRelatedToThirdPartyExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="woof_LineOfCreditBorrowingBaseReduction" name="LineOfCreditBorrowingBaseReduction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="woof_MaximumBorrowingCapacityOfEligibleAccountsReceivableInPercentage" name="MaximumBorrowingCapacityOfEligibleAccountsReceivableInPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_BorrowingCapacityOfNetOrderlyLiquidationValueOfEligibleInventoryInPercentage" name="BorrowingCapacityOfNetOrderlyLiquidationValueOfEligibleInventoryInPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_LesserThanThirtyThreePointThreePercentageOfLineCapMember" name="LesserThanThirtyThreePointThreePercentageOfLineCapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_LesserThanSixtySixPointSevenPercentageButGreaterThanOrEqualToThirtyThreePointOfLineCapMember" name="LesserThanSixtySixPointSevenPercentageButGreaterThanOrEqualToThirtyThreePointOfLineCapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_GreaterThanOrEqualToSixtySixPointSevenPercentageOfLineCapMember" name="GreaterThanOrEqualToSixtySixPointSevenPercentageOfLineCapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_PercentageOfAverageHistoricalExcessAvailabilityOfLoans" name="PercentageOfAverageHistoricalExcessAvailabilityOfLoans" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="woof_UnsecuredFloatingRateSeniorNotesMember" name="UnsecuredFloatingRateSeniorNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_NewSeriesNotesMember" name="NewSeriesNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_ThreePercentageSeniorNotesMember" name="ThreePercentageSeniorNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_AdjustmentsToAdditionalPaidInCapitalDebtUnamortizedDeferredFinancingCosts" name="AdjustmentsToAdditionalPaidInCapitalDebtUnamortizedDeferredFinancingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="woof_DebtConversionAccruedInterestAmountConverted" name="DebtConversionAccruedInterestAmountConverted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="woof_NumberOfInterestRateCapAgreements" name="NumberOfInterestRateCapAgreements" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="woof_NonQualifiedDeferredCompensationPlanMember" name="NonQualifiedDeferredCompensationPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_InvestmentsOfOfficersLifeInsuranceMember" name="InvestmentsOfOfficersLifeInsuranceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_RestrictedCashMember" name="RestrictedCashMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_ImpairmentOfFixedAssetAndRightOfUseAsset" name="ImpairmentOfFixedAssetAndRightOfUseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="woof_RestrictedStockUnitsRSUAndRestrictedStockAwardsMember" name="RestrictedStockUnitsRSUAndRestrictedStockAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_TwoThousandSixteenIncentivePlanMember" name="TwoThousandSixteenIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_TwoThousandTwentyOneEquityIncentivePlanMember" name="TwoThousandTwentyOneEquityIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="woof_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="woof_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsNumberOfSharesAvailableForGrant" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsNumberOfSharesAvailableForGrant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
</xsd:schema>
