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Twenty-four Holstein steers and 23 Holstein bulls (initial body weight=252±3.5kg and age=187±7.5d) were randomly allocated to 4 treatments arranged in a 2×2 factorial design with gender (bulls vs steers) and vitamin A supplementation (either restricted at 1.3×1000IU/kg, VAR, or supplemented at 4.6×1000IU/kg, CTR) to evaluate the effect of vitamin A restriction on performance, carcass and meat quality...
The effects of Burdizzo pre-pubertal castration on performance, behaviour, carcass, and meat quality of Holstein bulls fed high-concentrate diets were evaluated. Two hundred bulls (8.0±0.42 months old) were randomly assigned to control (CTR) or Burdizzo castration (BURD). After 121d, ADG, BW, and HCW were greater in CTR animals than in BURD animals, as well as, the agonistic and sexual behaviour....
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