One of my month old Sebright males started to be a bully last night....but he only picks on the Sebright girls and none of the other breeds of chicks I have. I tried to separate him and put him in timeout in a separate cage and he was not happy.He continuously kept pecking and testing every square inch of the cage looking for a way out. I put him back in with the rest after a few minutes and he eventually calmed down and they all went to bed for the night. This morning all seemed fine and business as usual... What would cause the little bugger to be such a turd? It might be that he just figured out he's a rooster and wants to be top dog....but why only pick on the other Sebright girls?