Effect of milk or milk replacer offered at varying levels on growth performance of Friesian veal calves

The objective was to determine the growth performance of Friesian calves given milk or milk replacer (MR) at varying levels. Forty-eight male Friesian calves were divided into four groups of 12 animals each. Calves were offered either milk or MR at either 10 or 15% of body weight (BW), with upper limits of 5 and 6 L/d, respectively until week 8. The calves were weaned at 10 weeks of age by gradually reducing the offered liquid to zero. In addition, from the second week, calves were offered calf starter ration (CS) until each calf reached 120 kg. The calves raised on milk had better growth rates (610 ± 25 vs. 487 ± 25 g/d; P0.05), displayed higher weaning weights (71 ± 1.5 vs. 55.9 ± 1.5 kg; P0.05) and reached the target weight of 120 kg earlier (20.9 ± 0.8 vs. 24.1 ± 0.8 weeks; P0.05) than those on MR. However, growth rate was not affected (535 ± 25 vs. 568 ± 25; P0.05) by liquid feeding level. Cost per kg live weight gain was not affected (325 ± 8 vs. 319 ± 8; P0.05) by feeding source or feeding levels (317 ± 8 vs. 328 ± 8). Thus, feeding milk at 10% of body weight saves time and labour required to achieve target weight in veal calves.