In reference to my 1 year old male Bichon who has many allergies and has been getting allergy injections for about 6 months now and I have seen a difference but I am still concerned about the constant anal licking and scooting. Vet has emptied anal glands and said no infection, but the condition is very persistent. He is on heartworm med. and I have not seen any evidence of tapeworm, Anal area is very red and some hair loss from chewing on tail. Please advise if possible