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  <xsd:element abstract="true" id="zts_HorsesMember" name="HorsesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="zts_InventoryandIntercompanyWriteOffsAfterSeparation" name="InventoryandIntercompanyWriteOffsAfterSeparation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element id="zts_LineofCreditFacilityCovenantComplianceMaximumLeverageRatioNextTwelveMonths" name="LineofCreditFacilityCovenantComplianceMaximumLeverageRatioNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
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  <xsd:element id="zts_NumberOfMajorProductCategories" name="NumberOfMajorProductCategories" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="zts_NumberofRegionalSegments" name="NumberofRegionalSegments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="zts_OtherComprehensiveIncomeLossNetOfTaxSeparationAdjustments" name="OtherComprehensiveIncomeLossNetOfTaxSeparationAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="zts_OtherComprehensiveIncomePensionPlanSettlementCharge" name="OtherComprehensiveIncomePensionPlanSettlementCharge" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="zts_OtherEquityBasedOrCashBasedAwardsMember" name="OtherEquityBasedOrCashBasedAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="zts_OtherInternationalCountriesMember" name="OtherInternationalCountriesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_OtherLitigationMember" name="OtherLitigationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="zts_OtherTaxesPayableMember" name="OtherTaxesPayableMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_OtherchangesinassetsandliabilitiesnetofacquisitionsanddivestituresandtransferswithPfizerInc.Abstract" name="OtherchangesinassetsandliabilitiesnetofacquisitionsanddivestituresandtransferswithPfizerInc.Abstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element id="zts_ParentCompanyInvestment" name="ParentCompanyInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="zts_PaymentToRelatedPartyInConnectionWithAssetTransfer" name="PaymentToRelatedPartyInConnectionWithAssetTransfer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
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  <xsd:element id="zts_PercentageOfTotalRevenuesByCountry" name="PercentageOfTotalRevenuesByCountry" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="zts_PfizerStockBenefitPlansMember" name="PfizerStockBenefitPlansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
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  <xsd:element id="zts_PropertyPlantAndEquipmentNumberOfManufacturingFacilities" name="PropertyPlantAndEquipmentNumberOfManufacturingFacilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="zts_PropertyPlantAndEquipmentNumberOfManufacturingFacilitiesRetainedByRelatedParty" name="PropertyPlantAndEquipmentNumberOfManufacturingFacilitiesRetainedByRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="zts_PurchaseAccountingAdjustmentsMember" name="PurchaseAccountingAdjustmentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_ReclassificationOfNetLiabilityDueToRelatedParty" name="ReclassificationOfNetLiabilityDueToRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element id="zts_RestructuringAndImplementationCosts" name="RestructuringAndImplementationCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="zts_RestructuringChargesAndCertainAcquisitionRelatedCostsMember" name="RestructuringChargesAndCertainAcquisitionRelatedCostsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_RestructuringReserveUtilizationAndOther" name="RestructuringReserveUtilizationAndOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="zts_RevenueByMajorCustomerPercentage" name="RevenueByMajorCustomerPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_RevenueDenominatedInForeignCurrency" name="RevenueDenominatedInForeignCurrency" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_RoxarsoneThreeNitroMember" name="RoxarsoneThreeNitroMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_SatelliteManufacturingSitesMember" name="SatelliteManufacturingSitesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_ScheduleOfCostReductionAndProductivityInitiativesAndAcquisitionRelatedCostsTextBlock" name="ScheduleOfCostReductionAndProductivityInitiativesAndAcquisitionRelatedCostsTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_ScheduleOfExpensesAllocatedFromSeparationLineItems" name="ScheduleOfExpensesAllocatedFromSeparationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="zts_ScheduleOfSeparationAdjustmentsLineItems" name="ScheduleOfSeparationAdjustmentsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
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  <xsd:element abstract="true" id="zts_SeniorNotesDue2016Member" name="SeniorNotesDue2016Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_SeniorNotesDue2018Member" name="SeniorNotesDue2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_SeniorNotesDue2023Member" name="SeniorNotesDue2023Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_SeniorNotesDue2043Member" name="SeniorNotesDue2043Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_SeniorNotesTransferredToRelatedParty" name="SeniorNotesTransferredToRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="zts_SeparationActivitiesAndInitialPublicOfferingAbstract" name="SeparationActivitiesAndInitialPublicOfferingAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_SeparationActivitiesAndInitialPublicOfferingDisclosureTextBlock" name="SeparationActivitiesAndInitialPublicOfferingDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_SeparationAdjustmentMember" name="SeparationAdjustmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedVestingAdditionalExpense" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedVestingAdditionalExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareBasedCompensationArrangementByShareBasedPaymentAwardCashPaymentRelatedtoUnvestedForfeitedAwards" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardCashPaymentRelatedtoUnvestedForfeitedAwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedDividendEquivalentsInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedDividendEquivalentsInPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedDividendEquivalentsWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedDividendEquivalentsWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePricePercentageOfFairMarketValuePriceAtDateOfGrant" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisePricePercentageOfFairMarketValuePriceAtDateOfGrant" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumValueOfPaymentMadeToPlanParticipant" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumValueOfPaymentMadeToPlanParticipant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareholderRightsPlanExercisePricePerUnit" name="ShareholderRightsPlanExercisePricePerUnit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareholderRightsPlanPercentofOwnership" name="ShareholderRightsPlanPercentofOwnership" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_ShareholderRightsPlanRedemptionPricePerRight" name="ShareholderRightsPlanRedemptionPricePerRight" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_ShareholdersEquityAbstract" name="ShareholdersEquityAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_ShortTermDebtMaximumBorrowingCapacity" name="ShortTermDebtMaximumBorrowingCapacity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="zts_SignificantaccountingpoliciesLineItems" name="SignificantaccountingpoliciesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_SignificantaccountingpoliciesTable" name="SignificantaccountingpoliciesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_StandUpCosts" name="StandUpCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="zts_StockIssuedDuringPeriodValueNewIssuesAndReclassificationOfUnitEquity" name="StockIssuedDuringPeriodValueNewIssuesAndReclassificationOfUnitEquity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="zts_StockholdersEquityNetTransfersBetweenRelatedPartyAndNoncontrollingInterests" name="StockholdersEquityNetTransfersBetweenRelatedPartyAndNoncontrollingInterests" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="zts_StockholdersEquityNetTransfersToRelatedParty" name="StockholdersEquityNetTransfersToRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_SwineMember" name="SwineMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_TaxExpenseOnUndistributedEarningsNotReinvestedAmount" name="TaxExpenseOnUndistributedEarningsNotReinvestedAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_TaxesonincomeLineItems" name="TaxesonincomeLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_TaxesonincomeTable" name="TaxesonincomeTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_TransitionalServicesAgreementMember" name="TransitionalServicesAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_TypesOfJointVentureAxis" name="TypesOfJointVentureAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_TypesOfJointVentureDomain" name="TypesOfJointVentureDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_UlianopolisBrazilMember" name="UlianopolisBrazilMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_UnrecognizedTaxBenefitsAdjustmentsAssociatedWithTheSeparation" name="UnrecognizedTaxBenefitsAdjustmentsAssociatedWithTheSeparation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="zts_UnrecognizedTaxBenefitsAndTaxSettlementsAndResolutionOfCertainTaxPositions" name="UnrecognizedTaxBenefitsAndTaxSettlementsAndResolutionOfCertainTaxPositions" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="zts_UnrecognizedTaxBenefitsNetLiabilities" name="UnrecognizedTaxBenefitsNetLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="zts_VaccinesMember" name="VaccinesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_WeightedaverageassumptionsusedtodeterminebenefitobligationsAbstract" name="WeightedaverageassumptionsusedtodeterminebenefitobligationsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="zts_WyethMember" name="WyethMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>


