Nulo Frontrunner Ancient Grains Barley & Beef Adult Dry Dog Food is made from a careful selection of animal-based proteins, including real deboned pork and beef, as well as low-glycemic grains. With a balanced amount of omega-3 and omega-6 fatty acids, this high-meat kibble is the perfect dry food for adult dogs of all breeds. What’s more, Nulo Frontrunner includes taurine for heart health and probiotics to support your furry friend’s digestive and immune systems.