My big chicken won't let any of the bantams do anything. She pecks them, chases them, and occasionally pulls out clumps of feathers! She is extremely intelligent for a chicken, and has always been a very sweet, chicken until we got more chicks. We don't know what to do, if we lock her up she'll throw herself against the chicken wire, and I'm worried she's gonna hurt herself doing that. Any ideas on how to calm her down?