NutriSource Element Series offers an advanced diet for canine companions created with nutrition in mind. It all starts with the animal protein. Dogs crave certain foods for a reason - their nutritional needs were shaped by evolutionary biology. Element Series Open Waters Haddock, Trout, & Duck blends, with wholesome grains contains 83% animal protein in every bowlful. From nose to tail, inside and out, Element Series provides well-balanced nutrition, representing an evolution of canine diets.