Nulo - Frontrunner - Pork, Barley, & Beef Dry Dog FoodCanine legends arent born. Theyre made. While Pea Protein and Potato Protein are ways many brands boost the protein in their foods, we believe animal based proteins contain the optimal amino acid profile to help them run at the front of the pack. Our dogs have many great moments ahead of them, so lets provide them with nutrition that nourishes their mind, body, and soul for years to come.