Hills prescription diet includes a variety of clinically tested therapeutic foods for treating a variety of different conditions in dogs and cats hills prescription diet canine zd food sensitivities is a dietetic dry kibble for dogs with food intolerances and allergies and is ideal as an elimination diet typical symptoms of a food intolerance are sensitive or irritated skin uneven coat as well as inflammation of the gastro intestinal tract causing sickness or diarrhea hills prescripti