After her recovery, I would chose 1 or 2 other hens to put in with her a few days, 48 hours should do it.. I did that when I added my buckeye to the flock. after her quarantine time was up, I had enough room to add another chicken into that pen, I did it for a week. it's alot better to divide the hen pecking than for 1 bird to take it all.@lalaland
How long did it take your girl to heal? This looks really bad, but I observed her eating and drinking which is good. She ate all her regular food tonight.
One thing that is really frustrating is that since she is the bottom of the pecking order, I was already having issues with her fitting in. Isolating her like this then trying to re-integrate her is probably not going to happen. Right now, because of the way they treat her anyway, it's not safe for her to be out with them. And if she heals...by the time she can go back out I think it would not be good for her, unfortunately.
I'm not even sure I have a bird that I can bring up front to join her without hazard to her at this point.