You could put some ointment on it, I would google that. But definitely separate her!! Bring her in, or in a different house or something!! Chickens love the color red and they will just bug her wound and make it worse! I'm not sure if a chicken apron would be good or not because it might rub against her wound, but it would definitely protect it. Spoil her and tend to her though!! But please separate her!!
Yep I separated her. She is in our house in a box. We put some ointment on her, I hope she is going to be ok.