I visited my husband's uncle's chicken coop yesterday to check out his chickens and was appalled to see that every single one of his birds had a completely bare, bright pink butt. He told us that they pick each others rear ends completely bald. It was awful looking! He said that every chicken he's ever had has done this. I need to make sure my chickens don't do this. If I notice it starting, how can I make sure to stop this behavior? Thanks!