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 wet food for dogs with food intolerances and allergies and is ideal as an elimination diet typical symptoms of food intolerances are itching sensitive or irritated skin uneven coat as well as inflammation of the gastro intestinal tract causing sickness or diarrhoea hills pre