Sixty four uncastrated males from zebu breeds Gyr, Guzerat, Mocho de Tabapuã and Nellore were used. The animals from each breed were divided into five groups (categories). One group was ramdomly assigned to immediate slaughter, three groups were full-fed a ration containing 50% concentrate, dry matter basis until reaching the slaughter weights of 405, 450 and 500 kg, respectively (group I, II and III). The fifth group was fed a restricted amount of the same ration to supply levels of […]