I originally had a flock of six, two RIRs two BAs and two buff orpingtons. We lost one of each except for the RIRs. Anyways, my chickens are partially free range, there pen is only 10x10 and I let them out when I can, but it's hard. My RIRs are incredibly mean to the other birds, one of them we call Big Red and she has been awful to the girls and to us. She pecked one of my buffs backs so badly that it was bleeding and she ran away. Whenever we go out there to clean the coop or give them treats or let them out she'll attack us, I actually have scars from her. It's gotten to the point were I'll start pushing at her with my foot. I've tried to get her used to us and like people again but nothing seem to be working. I put her in a separate cage from the others for a while but she would always knock over her food and water and get her bedding soaked. Sorry this is so much I just feel lost about what to do. Any advice would be greatly appreciated.