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  <xsd:element name="LatinAmericaAndCanadaMember" id="pahc_LatinAmericaAndCanadaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="CompensationAndBenefitForServicesMember" id="pahc_CompensationAndBenefitForServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" id="pahc_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="pahc_AllowanceForDoubtfulAccountsReceivableEffectOfChangesInExchangeRates" name="AllowanceForDoubtfulAccountsReceivableEffectOfChangesInExchangeRates" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" abstract="false" />
  <xsd:element id="pahc_ProductRegistrationsMarketingAndDistributionRightsMember" name="ProductRegistrationsMarketingAndDistributionRightsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="pahc_MinimumCommonStockOwnershipConversionThreshold" name="MinimumCommonStockOwnershipConversionThreshold" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" />
  <xsd:element id="pahc_DefinedBenefitPlanAmortizationOfActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCreditAndAmortizationOfPriorServiceCosts" name="DefinedBenefitPlanAmortizationOfActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCreditAndAmortizationOfPriorServiceCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" abstract="false" />
  <xsd:element id="pahc_MinimumParValueRequiredForCorporateBondToDetermineDiscountRate" name="MinimumParValueRequiredForCorporateBondToDetermineDiscountRate" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" abstract="false" />
  <xsd:element id="pahc_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromForeignCurrencyTranslation" name="UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromForeignCurrencyTranslation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" abstract="false" />
  <xsd:element id="pahc_DeferredTaxAssetsLeaseLiabilities" name="DeferredTaxAssetsLeaseLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" abstract="false" />
  <xsd:element id="pahc_AcquisitionRelatedItems" name="AcquisitionRelatedItems" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" abstract="false" />
  <xsd:element id="pahc_LongTermAndDeferredIncomeTaxes" name="LongTermAndDeferredIncomeTaxes" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" abstract="false" />
  <xsd:element id="pahc_DebtInstrumentRefinancingCosts" name="DebtInstrumentRefinancingCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" abstract="false" />
  <xsd:element id="pahc_TimeBasedRestrictedStockUnitsMember" name="TimeBasedRestrictedStockUnitsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="pahc_PerformanceBasedRestrictedStockUnitsMember" name="PerformanceBasedRestrictedStockUnitsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="pahc_TenLargestCustomersMember" name="TenLargestCustomersMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CorporateCosts" id="pahc_CorporateCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccruedExpensesAndOtherLiabilitiesCurrentTableTextBlock" id="pahc_AccruedExpensesAndOtherLiabilitiesCurrentTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OtherCountriesMember" id="pahc_OtherCountriesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EmploymentAgreementsCertainExecutiveManagementAndOtherEmployeesSeveranceBenefitsTermHighEndOfRange" id="pahc_EmploymentAgreementsCertainExecutiveManagementAndOtherEmployeesSeveranceBenefitsTermHighEndOfRange" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DeferredForeignIncomeTaxExpenseBenefitChangeInValuationAllowance" id="pahc_DeferredForeignIncomeTaxExpenseBenefitChangeInValuationAllowance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DeferredTaxLiabilitiesPropertyPlantAndEquipmentAndIntangibleAssets" id="pahc_DeferredTaxLiabilitiesPropertyPlantAndEquipmentAndIntangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OperatingLossCarryforwardsSubjectToExpiration" id="pahc_OperatingLossCarryforwardsSubjectToExpiration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="OperatingLossCarryforwardsNotSubjectToExpiration" id="pahc_OperatingLossCarryforwardsNotSubjectToExpiration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DefinedBenefitPlanPlanAssetsOtherMember" id="pahc_DefinedBenefitPlanPlanAssetsOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitPlanCommonCollectiveTrustGlobalLargeCapEquitiesMember" id="pahc_DefinedBenefitPlanCommonCollectiveTrustGlobalLargeCapEquitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitPlanCommonCollectiveTrustFixedIncomeSecuritiesMember" id="pahc_DefinedBenefitPlanCommonCollectiveTrustFixedIncomeSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitPlanGlobalAssetAllocationsAndRiskParityMember" id="pahc_DefinedBenefitPlanGlobalAssetAllocationsAndRiskParityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedContributionPlanEmployerDiscretionaryContributionPercent" id="pahc_DefinedContributionPlanEmployerDiscretionaryContributionPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DefinedBenefitPlanCashAndCashEquivalentsMeasurementInputPricePerUnit" id="pahc_DefinedBenefitPlanCashAndCashEquivalentsMeasurementInputPricePerUnit" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="OtherEmployeeBenefitPlansExpenseInternationalRetirementPlansSupplementalRetirementBenefitsAndLongTermIncentiveArrangements" id="pahc_OtherEmployeeBenefitPlansExpenseInternationalRetirementPlansSupplementalRetirementBenefitsAndLongTermIncentiveArrangements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CommonStockVotingRightsVotesPerShare" id="pahc_CommonStockVotingRightsVotesPerShare" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TrademarksAndTradeNamesAndOtherMember" id="pahc_TrademarksAndTradeNamesAndOtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditFacilitiesMember" id="pahc_CreditFacilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RevolverMember" id="pahc_RevolverMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InterestRateSwapJuly2022Member" id="pahc_InterestRateSwapJuly2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PaymentTermLowEndOfRange" id="pahc_PaymentTermLowEndOfRange" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PaymentTermHighEndOfRange" id="pahc_PaymentTermHighEndOfRange" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ScheduleOfResearchAndDevelopmentExpenseTableTextBlock" id="pahc_ScheduleOfResearchAndDevelopmentExpenseTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedLiabilitiesAndOtherLiabilitiesCurrent" id="pahc_AccruedLiabilitiesAndOtherLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtGrossMaturityYearOne" id="pahc_LongTermDebtGrossMaturityYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtGrossMaturityYearTwo" id="pahc_LongTermDebtGrossMaturityYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtGrossMaturityYearThree" id="pahc_LongTermDebtGrossMaturityYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtGrossMaturityYearFour" id="pahc_LongTermDebtGrossMaturityYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtGrossMaturityYearFive" id="pahc_LongTermDebtGrossMaturityYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtGrossMaturityAfterYearFive" id="pahc_LongTermDebtGrossMaturityAfterYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtMaturityInterestPaymentsYearOne" id="pahc_LongTermDebtMaturityInterestPaymentsYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtMaturityInterestPaymentsYearTwo" id="pahc_LongTermDebtMaturityInterestPaymentsYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtMaturityInterestPaymentsYearThree" id="pahc_LongTermDebtMaturityInterestPaymentsYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtMaturityInterestPaymentsYearFour" id="pahc_LongTermDebtMaturityInterestPaymentsYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtMaturityInterestPaymentsYearFive" id="pahc_LongTermDebtMaturityInterestPaymentsYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LongTermDebtMaturityInterestPayments" id="pahc_LongTermDebtMaturityInterestPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ScheduleOfInterestExpenseNetTableTextBlock" id="pahc_ScheduleOfInterestExpenseNetTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ScheduleOfDepreciationAndAmortizationTableTextBlock" id="pahc_ScheduleOfDepreciationAndAmortizationTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CreditAgreement2022TermLoanMember" id="pahc_CreditAgreement2022TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncrementalTermLoan2023DueApril2026Member" id="pahc_IncrementalTermLoan2023DueApril2026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccruedInsurancePremiumFinancingCurrent" id="pahc_AccruedInsurancePremiumFinancingCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DeferredTaxAssetsResearchAndDevelopmentCostCapitalization" id="pahc_DeferredTaxAssetsResearchAndDevelopmentCostCapitalization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DefinedBenefitPlanSettlementAnnuityPurchaseAgreementBenefitObligationAnnuityPurchasePrice" id="pahc_DefinedBenefitPlanSettlementAnnuityPurchaseAgreementBenefitObligationAnnuityPurchasePrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="July2023Member" id="pahc_July2023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentBasisSpreadOnVariableRateScenarioOneMember" id="pahc_DebtInstrumentBasisSpreadOnVariableRateScenarioOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentBasisSpreadOnVariableRateScenarioTwoMember" id="pahc_DebtInstrumentBasisSpreadOnVariableRateScenarioTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentBasisSpreadOnVariableRateScenarioThreeMember" id="pahc_DebtInstrumentBasisSpreadOnVariableRateScenarioThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentBasisSpreadOnVariableRateScenarioFourMember" id="pahc_DebtInstrumentBasisSpreadOnVariableRateScenarioFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InsurancePremiumFinancingFixedInterestRatePercentage" id="pahc_InsurancePremiumFinancingFixedInterestRatePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="InsurancePremiumFinancingMonthlyPaymentAmount" id="pahc_InsurancePremiumFinancingMonthlyPaymentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="JackC.BendheimMember" id="pahc_JackC.BendheimMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitPlanProjectedBenefitObligationDiscountRate" id="pahc_DefinedBenefitPlanProjectedBenefitObligationDiscountRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="PensionAdjustmentsAmountOfChangeInActuarialPresentValueOfBenefitReportedMember" id="pahc_PensionAdjustmentsAmountOfChangeInActuarialPresentValueOfBenefitReportedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PensionAdjustmentsAmountOfEarnedIncentiveAwardElectedToForgoMember" id="pahc_PensionAdjustmentsAmountOfEarnedIncentiveAwardElectedToForgoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" id="pahc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ForeignEmploymentTaxes" id="pahc_ForeignEmploymentTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PaymentsForInsurancePremiumFinancingAndOtherShortTermDebtFinancingActivities" id="pahc_PaymentsForInsurancePremiumFinancingAndOtherShortTermDebtFinancingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ProceedsFromInsurancePremiumFinancingAndOtherShortTermDebtFinancingActivities" id="pahc_ProceedsFromInsurancePremiumFinancingAndOtherShortTermDebtFinancingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ZoetisIncMedicatedFeedAdditiveProductPortfolioMember" id="pahc_ZoetisIncMedicatedFeedAdditiveProductPortfolioMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOperatingExpensesPercent" id="pahc_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOperatingExpensesPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostsPercent" id="pahc_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionCostsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationImpactOfForeignTaxCreditRegulationsAndRelatedChangesPercent" id="pahc_EffectiveIncomeTaxRateReconciliationImpactOfForeignTaxCreditRegulationsAndRelatedChangesPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationForeignWithholdingAndRelatedTaxesNetOnPlannedRepatriationPercent" id="pahc_EffectiveIncomeTaxRateReconciliationForeignWithholdingAndRelatedTaxesNetOnPlannedRepatriationPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CreditAgreement2024Member" id="pahc_CreditAgreement2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesMember" id="pahc_CreditAgreement20242024CreditFacilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentCovenantsNetLeverageRatioPriorToClosingDateMaximum" id="pahc_DebtInstrumentCovenantsNetLeverageRatioPriorToClosingDateMaximum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsInterestCoverageRatioPriorToClosingDateMinimum" id="pahc_DebtInstrumentCovenantsInterestCoverageRatioPriorToClosingDateMinimum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsNetLeverageRatioFirstFiscalQuarterEndingAfterClosingDateThroughEighteenMonthAnniversaryOfClosingDateMaximum" id="pahc_DebtInstrumentCovenantsNetLeverageRatioFirstFiscalQuarterEndingAfterClosingDateThroughEighteenMonthAnniversaryOfClosingDateMaximum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsNetLeverageRatioEighteenMonthAnniversaryOfClosingDateToThirtyMonthAnniversaryOfClosingDateMaximum" id="pahc_DebtInstrumentCovenantsNetLeverageRatioEighteenMonthAnniversaryOfClosingDateToThirtyMonthAnniversaryOfClosingDateMaximum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsNetLeverageRatioThirtyMonthAnniversaryOfClosingDateToFortyTwoMonthAnniversaryOfClosingDateMaximum" id="pahc_DebtInstrumentCovenantsNetLeverageRatioThirtyMonthAnniversaryOfClosingDateToFortyTwoMonthAnniversaryOfClosingDateMaximum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsNetLeverageRatioAfterFortyTwoMonthAnniversaryOfClosingDateMaximum" id="pahc_DebtInstrumentCovenantsNetLeverageRatioAfterFortyTwoMonthAnniversaryOfClosingDateMaximum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsInterestCoverageRatioAfterFortyTwoMonthAnniversaryOfClosingDateMinimum" id="pahc_DebtInstrumentCovenantsInterestCoverageRatioAfterFortyTwoMonthAnniversaryOfClosingDateMinimum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsInterestCoverageRatioEighteenMonthAnniversaryOfClosingDateToThirtyMonthAnniversaryOfClosingDateMinimum" id="pahc_DebtInstrumentCovenantsInterestCoverageRatioEighteenMonthAnniversaryOfClosingDateToThirtyMonthAnniversaryOfClosingDateMinimum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsInterestCoverageRatioFirstFiscalQuarterEndingAfterClosingDateThroughEighteenMonthAnniversaryOfClosingDateMinimum" id="pahc_DebtInstrumentCovenantsInterestCoverageRatioFirstFiscalQuarterEndingAfterClosingDateThroughEighteenMonthAnniversaryOfClosingDateMinimum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentCovenantsInterestCoverageRatioThirtyMonthAnniversaryOfClosingDateToFortyTwoMonthAnniversaryOfClosingDateMinimum" id="pahc_DebtInstrumentCovenantsInterestCoverageRatioThirtyMonthAnniversaryOfClosingDateToFortyTwoMonthAnniversaryOfClosingDateMinimum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesRevolvingCreditCommitmentsAndTerm1LoansMember" id="pahc_CreditAgreement20242024CreditFacilitiesRevolvingCreditCommitmentsAndTerm1LoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesRevolvingCreditCommitmentsMember" id="pahc_CreditAgreement20242024CreditFacilitiesRevolvingCreditCommitmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesTerm2LoansMember" id="pahc_CreditAgreement20242024CreditFacilitiesTerm2LoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesInitialTerm2LoansMember" id="pahc_CreditAgreement20242024CreditFacilitiesInitialTerm2LoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesDelayedDrawTerm2LoansMember" id="pahc_CreditAgreement20242024CreditFacilitiesDelayedDrawTerm2LoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesDelayedDrawTerm1LoansMember" id="pahc_CreditAgreement20242024CreditFacilitiesDelayedDrawTerm1LoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesInitialTerm1LoansMember" id="pahc_CreditAgreement20242024CreditFacilitiesInitialTerm1LoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CreditAgreement20242024CreditFacilitiesTerm1LoansMember" id="pahc_CreditAgreement20242024CreditFacilitiesTerm1LoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossArisingDuringPeriodAmortizationOfNetActuarialLossBeforeTax" id="pahc_OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossArisingDuringPeriodAmortizationOfNetActuarialLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossArisingDuringPeriodCurrentPeriodNetActuarialGainLossBeforeTax" id="pahc_OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossArisingDuringPeriodCurrentPeriodNetActuarialGainLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="InterestRateSwapSeptember2024Member" id="pahc_InterestRateSwapSeptember2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentRefinancingCostsNewCreditorAndThirdPartyFinancing" id="pahc_DebtInstrumentRefinancingCostsNewCreditorAndThirdPartyFinancing" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtInstrumentRefinancingCostsDebtExtinguishment" id="pahc_DebtInstrumentRefinancingCostsDebtExtinguishment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossCashFlowHedgeCumulativeGainLossBeforeTax" id="pahc_AccumulatedOtherComprehensiveIncomeLossCashFlowHedgeCumulativeGainLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeTax" id="pahc_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanBeforeTax" id="pahc_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="BusinessAcquisitionProFormaOperatingIncomeLoss" id="pahc_BusinessAcquisitionProFormaOperatingIncomeLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="InterestRateSwapMarch2025Member" id="pahc_InterestRateSwapMarch2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InterestIncomeExpenseNonoperatingDebtReductionOfInterestExpensePatronageReceived" id="pahc_InterestIncomeExpenseNonoperatingDebtReductionOfInterestExpensePatronageReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="O2026Q1DividendsMember" id="pahc_O2026Q1DividendsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="August2025Member" id="pahc_August2025Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" id="pahc_PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossTaxExpenseBenefitDerivativeInstruments" id="pahc_AccumulatedOtherComprehensiveIncomeLossTaxExpenseBenefitDerivativeInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossTaxExpenseBenefitIntercompanyInvestments" id="pahc_AccumulatedOtherComprehensiveIncomeLossTaxExpenseBenefitIntercompanyInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossTaxExpenseBenefitNetPensionGainsLosses" id="pahc_AccumulatedOtherComprehensiveIncomeLossTaxExpenseBenefitNetPensionGainsLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LongTermDebtExcludingRevolvingCreditFacilityMember" id="pahc_LongTermDebtExcludingRevolvingCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeferredTaxAssetsAcquisitionRelatedExpenses" id="pahc_DeferredTaxAssetsAcquisitionRelatedExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromCurrentPeriodTaxPositions" id="pahc_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromCurrentPeriodTaxPositions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositionsAndSettlementsWithTaxingAuthorities" id="pahc_UnrecognizedTaxBenefitsIncreaseDecreaseResultingFromPriorPeriodTaxPositionsAndSettlementsWithTaxingAuthorities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedExpensesAndOtherLiabilities" id="pahc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedExpensesAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BusinessCombinationRecognizedAssetAcquiredOtherAssetsCurrentAndNoncurrent" id="pahc_BusinessCombinationRecognizedAssetAcquiredOtherAssetsCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="InsuranceInvestmentsNoncurrent" id="pahc_InsuranceInvestmentsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LineOfCreditFacilityMaximumBorrowingCapacityIncrease" id="pahc_LineOfCreditFacilityMaximumBorrowingCapacityIncrease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAndTaxExemptIncomeAmount" id="pahc_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAndTaxExemptIncomeAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAndTaxExemptIncomePercent" id="pahc_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAndTaxExemptIncomePercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IncomeTaxPaidFederalAndStateAndLocalAfterRefundReceived" id="pahc_IncomeTaxPaidFederalAndStateAndLocalAfterRefundReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationTaxCreditFederalAndForeignPercent" id="pahc_EffectiveIncomeTaxRateReconciliationTaxCreditFederalAndForeignPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IndustrialFacilityBeitShemeshIsraelMember" id="pahc_IndustrialFacilityBeitShemeshIsraelMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="August2026Member" id="pahc_August2026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="July2026Member" id="pahc_July2026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAverageClosingStockPricePerShareForEachTradingDayIn90CalendarDayPeriodPricePerShareMinimum" id="pahc_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAverageClosingStockPricePerShareForEachTradingDayIn90CalendarDayPeriodPricePerShareMinimum" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAverageClosingStockPricePerShareForEachTradingDayIn90CalendarDayPeriodPricePerShareMaximum" id="pahc_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAverageClosingStockPricePerShareForEachTradingDayIn90CalendarDayPeriodPricePerShareMaximum" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAverageClosingStockPricePerShareForEachTradingDayIn90CalendarDayPeriodPercentageMaximum" id="pahc_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAverageClosingStockPricePerShareForEachTradingDayIn90CalendarDayPeriodPercentageMaximum" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TariffRecoveriesMember" id="pahc_TariffRecoveriesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LossContingencyReceivableCurrentReductionOfCostOfGoodsSold" id="pahc_LossContingencyReceivableCurrentReductionOfCostOfGoodsSold" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LossContingencyReceivableCurrentReductionOfInventory" id="pahc_LossContingencyReceivableCurrentReductionOfInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncomeTaxExpenseBenefitCrossBorderTaxNetControlledForeignCorporationTestedIncome" id="pahc_IncomeTaxExpenseBenefitCrossBorderTaxNetControlledForeignCorporationTestedIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
</xsd:schema>
