New Mumma to nine six-month old ladies: three RI Reds, three Rocks, three Buffs. All raised together from days old, first three months in our spare bedroom (MA Winters/Springs are cold!) before transitioning to their outdoor coop/run. All are laying beautifully. A few weeks ago I noticed one of the Rockies looked like she was missing feathers (they looked shorter) above her tail and a couple of days later she had a quarter sized hole in her side. I quickly separated, treated the wound daily and switched to a higher protein food - she healed up very quickly with lots of new feather growth. We tried to reintegrate our healed up Norma into the run this morning and all was well for about ten minutes until one of the Reds picked a fight with her. Before I could jump in to break it up another Red joined in attacking Norma. So, Norma is currently back on her own and we're unsure of how to proceed from here. Any/all advice would be so very appreciated!