Have you tried the Royal Canin hydrolyzed diet? When Sully’s allergies appeared, my vet prescribed him this food just so we could see if his allergies were food related or an environmental allergy. My vet told me that if his symptoms did not go away after a month or two of feeding him this food, then his allergies must be environmental because no dogs can be allergic to the Royal Canin hydrolyzed food. After feeding him the RC hydrolyzed diet for about a month or two, his symptoms were completely gone. It was a remarkable improvement. Maybe you should talk to your vet about Royal Canin and try it out. You also might want to consider environmental allergies like grass or something outside.
