To use this 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. Remember, this food is for adult cats aged 1 - 6 years old who are prone to hairballs. Don't feed it to kittens, pregnant or nursing cats. If your cat is in the pregnancy or nursing stage, switch to Hill’s Science Diet Kitten or Hill's Science Diet Kitten Indoor dry cat food. Store the cat food in a cool, dry place to maintain its freshness. Keep the bag tightly closed after each use.