Effect of Creep Feeding Supplementation on Growth Performance and Metabolic Characteristics of Nellore Heifers

The objective of this paper is to evaluate the effects of creep feeding supplementation during the preweaning phase on the growth performance and metabolic characteristics of Nellore heifers. Forty-two female Nellore calves (age = 100 ± 25 d; initial body weight (BW) = 113.4 ± 16.6 kg) were randomly assigned to the following treatments: control, where calves received mineral mix supplementation (<i>n</i> = 21); supplemented in creep feeding, where calves received 6 g/kg BW of a concentrate supplement (<i>n</i> = 21) during a period of 140 d. In the postweaning phase, all heifers received 6 g/kg BW of a concentrate supplement during a period of 210 d. Supplemented heifers had a greater average daily gain (ADG) than control heifers during the preweaning phase and, consequently, were heavier at weaning and at the end of the growing phase (<i>p</i> < 0.05). However, preweaning supplementation did not influence (<i>p</i> > 0.05) the body measurements or BW at the end of the growing period. Greater (<i>p</i> < 0.05) rib fat was observed in supplemented heifers. Concentrations of metabolites were not affected by preweaning supplementation (<i>p</i> > 0.05). Thus, supplementing heifers in the preweaning phase improved growth performance of weaning and body adiposity.