Efficacy of a feed-additive antibacterial combination for improving feedlot cattle performance and health

additif aux aliments des animaux aditivos de piensos animal health calves chlortetracycline costos costs feed additives feed conversion efficiency growth rate morbidite morbidity morbosidad mortalidad mortalite mortality sanidad animal sulfadimidine sulfamide sulfonamidas sulphonamides taux de croissance ternero tetraciclina tetracyclines veau