Promote your dog's mental performance with Purina PRO PLAN Age Defence. From approximately 7 years of age, a dog's brain begins to change how it metabolises glucose, which can affect memory, learning, attention, and decision-making. Purina PRO PLAN Age Defence contains a patented blend of nutrients proven to help improve curiosity and responsiveness by supporting cognitive function, with visible results within 30 days. Purina PRO PLAN Age Defence dry dog food is made with high quality chicken pieces as the first ingredient, and adapted protein and fat levels to help your dog stay in top shape during his golden years. Each Age Defence Formula also contains specific levels of botanical oils proven to help support cognitive function in the brain and promote alertness, mental sharpness, and family interaction in dogs 7 years and older. Glucosamine and EPA, an omega-3 fatty acid, help support the mobility of your dog's joints for healthy ageing.