I separated 3 young roos from the rest of the group after reading you could keep them separate from the hens and they won't fight.WRONG....... Unless they need to be completely out of sight of any hens. I have a Brahma, Sussex mix and a Sussex roo, the Brahma has bloodied the poor sussex, comb and when he put his head in the corner to protect that the nasty boy went after the sussex's but. So I let him(Sussex) out of the coop to let him run with the rest of the flock. At least when the other rooster go after him he can get away. one of this summers hatches gave me 3 rooster out of 6 hatched. I didn't wait to see how many roos in the last batch I gave them away. The co-worker I gave them to thought they all looked like hens, told him he would know for sure in 3 or 4 weeks if any started to crow. They are about 9 weeks old now. If I carry thees roos around so they are not afraid of me. thats good but how do you stop them from going after each other so viciously?