ColostrumMilkImmunization, PassiveImmunity, Maternally-AcquiredMilk, HumanMilk SubstitutesAnimals, NewbornCattleLactationAnimals, SucklingPregnancyImmunoglobulin A, SecretorySwineAnimal Nutritional Physiological PhenomenaImmunoglobulin GPassive Cutaneous AnaphylaxisLactoglobulinsLactoferrinImmunoglobulin A