To use this Purina Pro Plan cat food, simply serve it in your cat's bowl according to the feeding guidelines on the package. Make sure to provide fresh water at all times. Keep in mind that this food is specifically designed for senior cats aged 7 and above, so it may not be suitable for kittens or younger adult cats. Store the food in a cool, dry place and keep the bag tightly sealed to maintain freshness. If your cat has any special dietary needs or health conditions, it's always a good idea to consult your veterinarian before making any major changes to their diet.