Zignature Limited Ingredient Formula Grain-Free Whitefish Formula Dry Dog Food is made with Whitefish from the Pacific Ocean off Oregon, Washington and Alaska. Whitefish is a very healthy source of protein. It is low in sodium, high in Omega-3 Fatty Acids, B Vitamins, Niacin, Phosphorus and Selenium. The added fruits and vegetables supply antioxidants and fiber to aid in digestion. Suitable for all stages.