I have one hen that is very protective over her nest boxes in particular one box. She has began to draw blood on the chicken's combs and is continuing this behavior which is getting worse. Now pecking one chickens head. There is a lot of blood. I have looked on this site for what to do but can't find the answer for my situation. It's not lack of space, boredom, I have enough boxes and plenty of protein in their diet. I've tried blue -kote. What should I do? Block off box...separate her... please help me.