Hello! I have 13 laying Hens. Until today, I had 14. One of my Isa Browns was pecking the other hens. I have 4 chickens now that are raw from their butt going up their back. I'm worried that the exposed skin might get infected. Is there anything I can do to cover or put on the raw areas? What would have caused the Isa Brown to attack? They are 5 months old.