They are all the same age - we have 1 orpington roo with an orpington hen and a brahma hen... there is also a silkie roo and 4 silkie hens, but they pretty much ignore each other. The rooster just started attacking both hens today. He has pulled all of the feathers out of both big hens, so they are now bare. He's never done it before, so I don't know what's wrong! What should I do?