Guinea PigsSwineSwine DiseasesSus scrofaAnimal FeedWeaningAnimal Nutritional Physiological PhenomenaRandom AllocationSwine, MiniatureAnimal HusbandryWeight GainHousing, AnimalMeatIleumDigestionDietAbattoirsCarbadox6-PhytasePorcine Reproductive and Respiratory SyndromePorcine respiratory and reproductive syndrome virusAnimals, NewbornBody WeightCircovirusFecesEatingBody CompositionSpecies SpecificityActinobacillus pleuropneumoniaeGastrointestinal ContentsAnimals, SucklingPhosphorus, DietarySoybeansGerm-Free LifeActinobacillus InfectionsTime FactorsBreedingHandling (Psychology)Dietary ProteinsPneumonia of Swine, MycoplasmalStreptococcus suisLitter SizeWasting SyndromeLiverDose-Response Relationship, DrugAnimal WelfareDisease Models, AnimalZea maysAmino AcidsLungColostrumDietary SupplementsMolecular Sequence DataIntestine, SmallIntestinesBlood Urea NitrogenPleuropneumoniaAdipose TissueFloors and FloorcoveringsTracheaPhosphorusNutritive ValueManurePseudorabiesMuscle, SmoothLeast-Squares AnalysisTransportationLawsonia BacteriaModels, AnimalMyocardiumPhenethylaminesCecumLysinePregnancyClassical Swine FeverJejunumDesulfovibrionaceae InfectionsZinc OxideNitrogenOrgan SizeChlortetracyclineScurvySkatoleSalmonella Infections, AnimalSpecific Pathogen-Free OrganismsGrowth HormoneAscorbic Acid DeficiencyCerealsRhinitis, AtrophicRabbitsKidneyCattlePregnancy, AnimalKineticsDysenteryAmino Acid SequenceCrowdingIntestinal MucosaMuscle ContractionAntibodies, Viral