Zignature's Trout and Salmon Meal Formula combines two of the healthiest fish protein sources in the world. Both fish are high in heart healthy Omega-3 fatty acids. They are also rich in minerals, namely potassium, phosphorous, and selenium. They combine to promote healthy blood pressure, strong bones and teeth, and robust immune system. Zignature's recipes are always grain free for a healthy, hypoallergenic diet. They bring together two great tasting fish that you dogs will love. Zignature Trout and Salmon Meal Formula - Learned from Nature, Crafted to Perfection.