Food sensitivities and intolerances can cause skin irritation, ear conditions, and digestive upset. Cats with adverse food reactions, often due to food allergies or intolerances, benefit from a diet specifically designed to support food sensitivities. Hill's nutritionists and veterinarians developed Prescription Diet z/d, a clinical nutrition specially formulated to support cats with food sensitivities and help avoid adverse food reactions. Made with Hill's breakthrough ActivBiome+ Digestion, a proprietary blend of prebiotic fibers, which is clinically shown to activate the gut microbiome to support digestive health, improve stool quality and promote healthy stool.