Diamond Naturals Grain Free Whitefish & Sweet Potato Though dogs have adapted to a domesticated, omnivorous diet over the centuries, a protein-based diet free of grains more closely mimics their ancestral beginnings. Dogs are able to digest grains, but their bodies don't break down grains as efficiently as they do proteins and fats. A fish protein, grain-free formula for all life stages with sweet potatoes provides highly digestible energy and limits exposure to allergy triggers for your sensitive dog. The first ingredient is real fish for superior taste and nutrition. Supplemented with fruits and vegetables, Diamond Naturals Grain-Free, Whitefish & Sweet Potato formula provides powerful natural antioxidants for optimal health and vitality, while Omega 6 & 3 Fatty Acids keep the skin and coat healthy and shiny.