I have 1 leghorn in my flock. She has been pecking us when we go into the coop for a while. She has started to pull thigh feathers out of our other birds except our brahma who is quite a bit bigger than her. I'm not sure what to do with her. Can I break this habit? Should she be culled from the flock. There are feathers all over the place from her doing this. It's pretty constant. Any help would be greatly appreciated.