I have a buff orpington we think was attacked by dog. She has a 6 inch cut on her back in her skin, didn't see it at first (it's under her wing) look a couple days old blood dried and skin edges are dry. What can I do to help her. She seems ok. Not sure if eating or drinking yet, I think she trying to stay away from rooster. Gash is where roosters mount her. Don't know if I should try to sew gash up??? Thanks for any help!