I have 4 hens all about 6 months old. I believe one is being bullied. She has a large spot on her back that is bald. I have separated her from the rest so she can heal. Is that right? Or do I separate the bully out? My coop is 4×8 with a run that is 8 feet wide by 10 feet long. I have 2 ladders with a board across for them to climb on so they can get up off the ground. I have attached pics. Advice appreciated!