Hill's Prescription Diet z/d Dog Wet Food Sensitive 370gHill's PRESCRIPTION DIET z d Dog Food Food sensitivities and intolerance are potentially serious problems that can result in irritated skin, coat and ear conditions or even gastrointestinal upset. Dogs 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