To use this Catit canned cat food topper, simply open a can and spread the jelly - based shreds over your cat's regular food. It can be served as a daily treat or a regular part of your cat's diet. Always make sure to provide fresh water for your cat when feeding this wet food. After opening, if there's any leftovers, cover the can and store it in the refrigerator. Use the remaining food within 1 - 2 days. Keep the unopened packs in a cool, dry place away from direct sunlight. This food is formulated for cats, so don't feed it to other pets.