Prescription Diet® z/d® Canine pet food is specially formulated by nutritionists & veterinarians to help dogs with skin and food sensitivities and is clinically proven nutrition to improve GI signs in 21 days and derm signs in 30 days. Hills zd contains highly hydrolyzed protein which is abhighly digestible animal protein source; no intact animal protein. Single source carbohydrate helps avoid common food allergens. Added Omeg-6 Fatty Acids help to nourish the skin and coat. High levels of Antioxidants help maintain a healthy immune system and the skin barrier protection. Increased Vitamin E and antioxidants for improved skin and coat, plus natural fiber for firmer stools. Crafted with highly hydrolyzed chicken protein and a single purified carbohydrate source. Simply pure: no intact animal proteins, soy protein, artificial flavors, preservatives, gluten, lactose or chicken by-product meal. Ingredients: Corn Starch, Hydrolyzed Chicken Liver, Powdered Cellulose, Soybean Oil, Calcium Carbonate, Dicalcium Phosphate, Lactic Acid, Potassium Chloride, Glyceryl Monostearate, Choline Chloride, Iodized Salt, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Riboflavin Supplement, Folic Acid, Vitamin D3 Supplement), DL-Methionine, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Taurine, Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene.