Carcass yield and growth of organs and innards of 40 crossbreed F1 Holstein X Gir calves fed different liquid diets (whole milk or fermented colostrum-based diets), supplemented or not with soy oil (45 mL) and with or without growth promoter Zeranol were evaluated. The animals were daily fed a diet with concentrate (23% crude protein), Tifton hay ad libitum and 3 L of milk or fermented colostrum. The animals were slaughtered at average weight of 57.38 kg and 60 days old. No effect of feeding different liquid diets on the organs weight and non integrate carcass components was detected. However, calves fed milk and Zeranol showed heavier industrial meat weight. No effect of feeding liquid diets with Zeranol on Longissimus dorsi area was observed, with an average value of 15.27 cm². Animals fed fermented colostrum without Zeranol exhibited respective weights of rumen-reticulum, small intestine and mesentery of 954, 2,076 and 619 g. Calves fed diet supplemented with with soy oil had higher percentage of internal fat. Carcass length increased by 5.0% in animals fed milk with Zeranol and decreased by 5.5% in animals fed colostrum with Zeranol. Animals fed fermented colostrum without Zeranol showed carcass 5.0% heavier than those fed whole milk without Zeranol. Performance (hot and cold carcass weight) of animals fed whole milk with Zeranol was similar to those fed fermented colostrum with Zeranol. Animals fed milk showed greater bone and fat proportions in the carcass.
development; whole milk; fermented colostrum; soy oil; Zeranol
