My RIR is plucking the feathers off her sisters' backs and eating them! My poor little bantam EE has a red bald spot, and the SLW has the beginnings of one. They're almost 5 months old, and are in the process of transitioning to being outside full-time. I think the plucking is a result of boredom. They've been going outside for longer and longer periods, and they have toys hanging from their indoor brooder to play with. We've separated the bully from the rest of the girls. I'm not sure what else to do. How do I discourage this kind of behavior?