I am in need of some advice for my one hen who was attacked by a dog yesterday. She was bitten on her back, but lucky for her she got away before it could harm her further. She was gone all night and most of the day today. She showed up around 5:00 pm. I picked her up and noticed her back had a bite on it and she was missing alot of feathers on her back. I isolated her from the other chickens and rooster. Any one have any advice as to what I can use on her wound?