You can use this cat food as a topper on your cat's regular food or serve it as a complete meal. It's great as an occasional treat too. Just open the can and serve. There are no artificial preservatives, but it's best to refrigerate the leftovers after opening and use them within a couple of days. Keep it in a cool, dry place before opening. This food is suitable for kittens, adult cats, and senior cats, but if your cat has any specific health issues, it's always a good idea to consult your vet.