Relieve your dog’s skin irritation and digestive upset with Hill’s Prescription Diet z/d Hydrolyzed Chicken Flavor Dog Food. This clinical nutrition is a “tasty and healthy reward” for dogs with food sensitivities. Formulated to help your pet “be healthy,” it uses highly hydrolyzed protein to avoid immune system detection and features ActivBiome+ technology to firm loose stool in as little as 3 days while promoting visible skin improvement.