I have a RIR that I think is a male...because out of 50 chickens he is the most aggressive. Anyway, he is attacking a lot of the other chickens by pecking at their feet. Several of the other chicks are joining in to the point of making the victim of his attacks almost unable to stand. They were all out in a huge fenced pen. Of course, we put him a pen of his own now, along with one of his pals. They are about two months old now. What is wrong with this monster?