To use this Royal Canin cat food, simply serve it to your adult cat according to the feeding guidelines on the package. Make sure your cat has access to fresh water at all times. When transitioning your cat to this new food, do it gradually over 7 - 10 days to avoid digestive upset. Store the food in a cool, dry place to maintain its freshness. Keep the bag tightly closed after each use. If you have any concerns about your cat's health or diet, consult your veterinarian.