Effects of spray-dried bovine plasma protein in milk replacers fed at a high plane of nutrition on performance, intestinal permeability, and morbidity of Holstein calves

Spray-dried plasma protein (SDP) has been shown to improve growth and intestinal function in young calves when included milk replacers (MR) fed at conventional rates. Use of an SDP wheat blend replace a portion whey perform similarly using all-whey control MR. However, trend the dairy industry is feed for greater rates during preweaning period. The purpose this study was determine effects increasing amounts inclusion MR on health high plane nutrition. Young (<7 d) Holstein were offered starter assigned 1 5 treatments: all-milk (whey) (0SDP, n = 26) or containing 5% (5SDP, 20), 7.5% (7.5SDP, 14), 10% (10SDP, 12% approximate 1:1 plus (PW, 17). All formulated contain 26% CP 16% fat maximum rate kg powder (as fed) from d 8 36. Amounts decreased by 25%/wk 37 weaning 57. Thereafter, provided only until end 63. On 4, 15, 36, 57, permeability assessed via oral administration lactulose d-mannitol followed analysis mannitol blood 60 min after administration. Increasing led small linear decrease consumed. There tendency positive relationship between average daily gain body weight, had mixed frame variables. tended increase fecal scores increased amount fluid therapy given. Diet no effect permeability. serum total cholesterol urea N have quadratic glucose concentration Calves PW withers height, likelihood being medicated any reason respiratory illness, but not different diet otherwise. Feeding lead Results indicate that can be up as nutrition (1 kg/d powder, with improvements gain. Additionally, used difference most parameters.