Bovine Respiratory Disease ComplexMannheimia haemolyticaPasteurellaceae InfectionsCattle DiseasesMycoplasma bovisRespiratory Tract DiseasesPneumonia of Calves, EnzooticPasteurella multocidaTylosinThiamphenicolCattlePasteurella InfectionsParainfluenza Virus 3, BovineCoronavirus, BovineRespiratory Syncytial Virus, BovineAnimal HusbandryPasteurellosis, PneumonicInfectious Bovine RhinotracheitisPasteurellaceaeHaemophilus somnusPasteurellaRespiratory Tract InfectionsDiarrhea Virus 1, Bovine ViralOxytetracyclineBovine Virus Diarrhea-Mucosal DiseaseDiarrhea Viruses, Bovine ViralTransportationMycoplasma InfectionsWeight GainMacrolidesRespiration DisordersCanadaAnti-Bacterial AgentsRandom AllocationHerpesvirus 1, BovineLung Diseases