Ok I really need some help. I have 10 hens and a rooster... All of them are about the same size but different breeds. We have one hen that is repeatedly picked on. This summer they pecked off half her comb while we were at church... Several times she has had bald spots on her backside from pecking.... The latest incident I came home from work to find her huddle in a nesting box with all of the skin missing off the back of her head. As soon as we notice them bothering her we isolate her, clean her up and spray her with blue cote... After a day or two we put her back with the rest and they are fine for another few weeks. I don't know what to do... We have been letting them free range and giving them more scraps and I higher protein feed but they still go after her again and again.... Any suggestions?