There can be a variety of reasons for your dog's itchy, scratchy skin condition and upset stomach, from food allergy to food intolerance. A frequent cause is the abnormal reaction to the protein found in many pet foods. To help minimise chances of such a reaction Hills Prescription Diet Canine d/d Food Sensitivities Duck Rice uses novel protein sources (new to your dog). Thanks to specially selected protein and carbohydrate sources, this complete dry dog food is easy to digest. High quality protein from duck as well as carbohydrates from ground rice are gentle on the stomach, while a high level of omega-3 and omega-6 fatty acids can support a healthy skin and coat. To round out the recipe, there is a balanced mixture of vitamins, minerals, trace elements, beta carotene, and natural oxidants that may contribute to a healthy immune system as well as the proper maintenance of vital functions. A high quality dog food that is often prescribed by veterinary doctors for its therapeutic quali