Joana P Campolina, Sandra Gesteira Coelho, Anna Luiza Belli, Luiz F Martins Neves, Fernanda S Machado, Luiz G R Pereira, Thierry R Tomich, Wanessa A Carvalho, Raquel M P Daibert, Daniele R L Reis, Suely F Costa, Alessandra L Voorsluys, David V Jacob, Mariana M Campos
The objective of this study was to evaluate blood cells and metabolites, insulin-like growth factor-1 (IGF-1), digestibility, internal organs weight and histology, gene expression, and spleen cell proliferation of pre-weaned bull calves supplemented with a blend of essential oils in milk replacer (MR). Sixteen newborn Holstein × Gyr crossbred dairy bull calves, with body weight at birth of 33.3 ± 3.7 kg, were housed in individual sand bedded pens, blocked by genetic composition, and randomly assigned to 1 of 2 treatments in a randomized complete block design: Control (CON, n = 8) and blend of essential oils supplementation (BEO, n = 8, 1 g/day/calf, Apex Calf, Adisseo, China)...
February 28, 2023: Scientific Reports