I have 11 silkies that are about 9 or 10 weeks old. I am discovering that about half of them appear to be roosters. They are confined to their coop and pen, never free ranging. Should I expect problems with them getting along? So far there have been no major problems, but they are still young. I love them all and don't want to get rid of any if I don't have to. Also.....when can I expect to hear them learning to crow? I can't wait!