Nulo Challenger Northern Catch Haddock, Salmon & Redfish Recipe (Dry Dog Food) – smaller bag size. An oceanic blend of premium fish proteins and organic grains designed to nourish dogs from puppyhood through adulthood. It offers plentiful omega fatty acids for cognitive and coat health, along with Nulo’s unique probiotic support to maximize nutrient absorption and gut stability, all while delivering the taste of the sea dogs love.