Dog DiseasesPerianal GlandsDogsAdrenocortical HyperfunctionBreedingHybrid VigorCattleWeaningCrosses, GeneticLeast-Squares AnalysisSheepWoolGenetic VariationMeatAnimal HusbandrySheep, DomesticMicrosatellite RepeatsSpecies SpecificityBody WeightAnimals, Inbred StrainsLitter SizeAnimals, DomesticReproductionSwineWeight GainInbreedingSus scrofaGoatsHorsesGenotypeEquidaePortugalPhylogenyBirth WeightDystociaQuantitative Trait, HeritableFertilityAnimal FeedSeasons