While dogs of all ages thrive on grain-free, high-protein diets, senior dogs have special nutritional needs, such a special focus on hip and joint support and healthy metabolism. This recipe made for senior pups in mind starts with real deboned chicken for a leading 32 percent protein level and leading levels of glucosamine and chondroitin to foster healthy hips and joints and L-carnitine for healthy metabolism. Like all Merrick's grain-free dry recipes, this recipe is cooked in the USA in our own kitchens. Recipes contain no corn, wheat, soy or gluten ingredients.