NutriSource Element Series is formulated to met AAFCO guidelines for all life stages. The Elements series are high protein diets, legume and potato free, delivering maximum nutrient density, along with a proprietary pre- and pro-biotic blend to support digestion and healthy gut function. Open Waters is a blend of Haddock, Trout & Duck Blend with Heirloom Grains with 83% animal protein. 34% protein/16% fat.