Hill's Prescription Diet z/d ULTRA Allergen-Free Dog Food Canned (24 5.5-oz cans) digestible proteins that minimize the chances of bad reactions from your dog Hill's z/d ULTRA Allergen-Free dog food contains NO whole animal proteins incorporates digestible carbs and fats to minimize gastrointestinal strain in your pet's system contains boosted omega-3 and omega-6 fatty acids to improve your pet's skin health