I have recently noticed that 1 of my birds has had a lot of her feathers pecked off. This afternoon, I saw one of my other bird attacking her. She is very scared and doesnt want to come out of the coop at all. I looked at all the birds to see what else might be going on. One of them has a few feathers pecked off around where her wing meets her body. The other 2 are totally fine. I believe something has caused the 2 full feathered hens to pick on either 1 or both of the others. I dont know what might have caused this. I read that in might be disease and the others are trying to force the diseased bird out, but I dont know how to identify what it is. I also dont know if I should separate them. Should I take the 2 "bullies" out and re-establish the pecking order? Should I take the affected one out and but her back in one she is healed? Please help!