Effect of injectable castration administered at feedlot entry on gain performance, behavior, testosterone production, and serum haptoglobin concentration in beef bulls
Keywords:castration, beef cattle, injectable sterilization, zinc, feedlot, performance, behavior, testosterone, serum haptoglobin
The USDA estimates 15 million castration procedures are performed on bull calves in the United States annually. These are performed to reduce aggressiveness and sexual activity, facilitate handling, prevent unwanted breeding, and improve the meat quality of steers. Currently, no commercially available injectable sterilization methods exist for beef cattle in the US. The objective of the current study was to evaluate the effect of a zinc solution as an injectable castration method when administered to beef bull calves at feedlot entry on performance, behavior, testosterone production, and serum haptoglobin concentration.