Royal canin medium ageing 10 is a complete dry dog food for medium sized breed dogs over the age of 10 years it is made carefully selected nutrients to help your dog age gracefully epa dha and an exclusive antioxidant complex which helps to protect the cells against free radicals medium sized breeds are often more robust and agile than other dogs and their activity levels cover a wide range from quiet family dogs to working dogs the family dog may tend to put on weight and will need a care