The role of the rooster is to protect the hens in the presence of other roosters, intruders or predators. As puberty approaches, a young rooster's hormones make him combative.
Lack of socialization can also contribute to aggression. Health problems or physical pain can also be contributing factors to a rooster’s aggression. It is recommended to wear gloves, thick clothing and boots to avoid being injured by beaks, claws and spurs. The rooster may be necessary to find him a new, more suitable environment or simply to put him down.