Our 4 year old Chow/Australian Shepard mix male dog has been scooting to the point he has lost hair on his hind legs /bottom – resembling a baboon. The skin is normal and not inflamed. We had his anal glands expressed, added pumpkin to his diet and had him checked a few weeks ago and his glands were ok. He has started scooting again. We were told he may have allergies and have put him on 1 diphenhydramine 25 mg daily. He stopped scooting for a few weeks, but is back at it again. Advice and suggestions are appreciated. Thank you.