Hello, I have a question. I know nothing about dogs but my Aunty and I were just talking and she has a dog named Asia. She is a lovely dog. I have babysat her on occasion. She is a 14 yr. old border collie mix. The skin is peeing off her armpits. Her skin and her hair are falling out, also her groin area. Vet sez she has no cancer. Well the vet doesn't know so what' s this about. Anyone. Is it simply old age or what