Food sensitivities and intolerance are potentially serious problems that can result in irritated skin, coat and ear conditions or even gastrointestinal upset. Cats that have adverse food reactions due to a food allergy (typically to a protein in the food) or intolerance, benefit from a food designed for food sensitivities. Hill's nutritionists and veterinarians developed Prescription Diet z/d clinical nutrition specially formulated to support a cat's food sensitivities and to help avoid adverse food reactions. How it helps: Formulated to help improve digestion & stool quality Helps eliminate food-related causes of skin irritation Promotes a healthy skin barrier Helps support a healthy immune system S+OXSHIELD: Formulated to promote a urinary environment that reduces the risk of developing struvite & calcium oxalate crystals. How it works: Highly hydrolyzed animal protein & a single carbohydrate source High levels of vitamin E and natural fiber Essential fatty acid enriched Controlled minerals for bladder health Formulated without additives known to cause food allergies in cats Clinically proven antioxidants