To use this Catit canned cat food topper, simply open a can and serve it on top of your cat's regular food. You can serve it as is or mix it gently with the kibble for an extra - flavorful meal. Keep in mind that this is a supplementary food, so it should be part of a balanced diet for your cat. Store the unopened packs in a cool, dry place. Once opened, if there's any leftovers, cover the can and refrigerate it. Use the remaining food within 24 hours to ensure freshness and safety for your cat.