I have been having issues with feather pulling. I have 7 hens in a metal shed. I have added treats and just a few days ago some BOSS. Also give mackrel.One of my hens has a lot of feathers gone on her head. I covered her with blukote. She was again pecked terribly on the head so I pulled her til lthe feathers grow in. Someone suggested I get a roo to put the girls in line,because the hen pecking by everyone is like a never ending battle to be top hen. Is a roo an answer when the hens won't stop attacking each other?