Result of vet check last night: the vet is feeling either scar tissue or a growth in Murray's left anal gland which he thinks is contributing to his continuing problems. If this doesn't resolve in the next eight weeks, I think we are looking at surgery. Our vet is great and knows all of Murray's allergy problems, drug reactions, etc., but I am really hoping we don't have to go through this. I'll let you all know what happens two months from now.