Castration is the surgical removal or destruction of the testicles of male farm animals, such as bulls, rams, and boars. The main reason for castrating farm animals is to make them sterile, that is, unable to reproduce. This is often done to control breeding, reduce aggression, and improve meat quality. Castrated animals also tend to grow faster and produce leaner meat, which is why it can indirectly lead to increased meat production. The removal of the testicles also causes a reduction in testosterone levels, which can lead to a decrease in male odour and potentially result in a loss of weight.