Has anyone had problems with hens of one breed or color sticking together and ignoring the others in the flock? We have a black sex link and an easter egger who are about the same size, shape, and color who mostly ignore but sometimes pick on our white leghorn. Should we get another white hen or do you think the behavior will pass? They've been together since they were chicks and are the only chickens we've ever had. They used to all hang out together and the leghorn even seemed a bit like the leader, but now she spends all day by herself and I feel bad for her.