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. Outback Trails is a Lamb, Kangaroo & Wild Boar Blend With Heirloom Grains and 84% Animal protein. 34% protein/16% fat.