You may have to keep her away from the flock till she heals because they will hurt her. If she is in a large cage, you could bring in one of her mates to visit with. Put her food where she can get it, make it soft--moist chicken feed, cooked eggs, tuna, and other high protein snacks, but mostly chick feed. She will either survive or not--you can give her good care to help her heal, and since she made it this far she might make it. Later when she is better you can set her cage out with her friends, but she will need to be slowly re-introduced. Maybe put her with a low pecking order friend or two at first. Good luck.