Rock got his name from his behavior, when he was just a pup he would not allow his fellow wolves to get close to him, and whenever they did he would claw vicously at them. The other pups called him boulder, as he would not let anyone in. The pack did what they could to dissuade this but unfortunately it still appears. Luckily, though, they found that if they could direct it to another source things would go better. Thus making Rock an excellent hunter.