Hill's Prescription Diet™ z/d™ Canine ULTRA Adverse reaction to food. Food sensitivities and intolerance are potentially serious problems that can result in sensitive or irritated skin, coat and ear conditions or even gastrointestinal upset. Dogs that have a food sensitivity or intolerance, also called adverse reactions to food, typically experience an abnormal response to the protein in the food. If your dog suffers from adverse reaction to food, it is even more important to feed the right food. At Hill's, nutritionists and veterinarians have developed clinical nutrition especially formulated to help manage your dog's dietary sensitivity and help reduce the possibility of adverse reactions to food. Key Benefits Hill's Prescription Diet™ z/d™ Canine ULTRA is formulated with the following benefits: Formulated with Hill's Hydrolyzed Protein System, highly digestible proteins that minimise the chances of adverse reactions to food No intact animal protein to help avoid adverse reactions to food Highly digestible carbohydrates and fats to help reduce gastrointestinal workload Increased in omega 3 and 6 Fatty Acids to help nourish the skin Added antioxidants to control cell oxidation and promote a healthy immune system and skin barrier function Additional Info Hill's Prescription Diet™ z/d™ Canine ULTRA is a complete and balanced food that provides all the nutrition dogs need. Please consult your veterinarian for further information on how our Prescription Diet® foods can help your dog to continue to enjoy a happy and active life. Prescription Diet foods are made in our own U.S. facilities with ingredients from North America, Europe, Australia and New Zealand, which exceed industry standards for purity and nutrient content.