So I have a Dominique rooster who is about 6-7 months old. His spurs are just little nubbies. Not too long or sharp. Well, today, he decided that he was going to try to challenge my son for dominance. At the end of the scuffle, (he finally gave up when he realized that he wasn't going to win) one of his spurs was bleeding. He didn't seem to be in any pain, but we're worried about him. Is this normal? Do they heal/grow back?