Tributyrin supplementation in pasteurized waste milk: Effects on growth performance, health, and blood parameters of dairy calves

This study evaluated the effects of incremental tributyrin supplementation in pasteurized waste milk on growth performance, health, and blood metabolism dairy calves before after weaning. Forty-eight newborn female Holstein (39.6 ± 2.75 kg; mean standard deviation) were blocked by age randomly assigned to 3 treatments: (1) without supplementation, (2) with 1 g/L products (unprotected solid powder; containing 35% tributyrin), or (3) 2 products. The weaned d 56 raised until 77. Data analyzed for preweaning, postweaning, overall periods. results showed that starter intake hay not different among treatments any period trial, but crude protein tended increase linearly during period. Although had no body weight preweaning periods, increased postweaning. average daily gain postweaning No observed feed efficiency A positive linear relationship between length was period, differences found other structural measurements diarrhea concentration a negative frequency rectal temperature did differ treatment × week effect observed. For metabolism, insulin, hormone, total protein, albumin, globulin. serum amyloid yet haptoglobin decreased increasing Endothelin tendency decrease periods An associated IL-1β IL-6 tumor necrosis factor α These data suggest could performance health calves, reduce haptoglobin, endothelin, concentrations, indicating alleviating oxidative stress inflammatory status calves. Calves fed supplemented (containing tributyrin) at compared more improved health.