My fiance's dog (Golden Retriever/Chow mix) is approx. 14 years old. For several months she has been licking an area on her left hind leg, and we just recently noticed that it's a wound. We didn't think much of it before because she hasn't been limping, and it looked like she was just grooming herself. We can't afford the vet bills, but will seek help if we need to. I wanted to see if anybody can identify the wound, and if so, is it treatable? My fiance thinks it might be from a BB gun from the ranch she used to go to, or possibly a tumor. Any ideas? Thanks...