Using this dog food topper is super easy. Just open the single - serve pouch and sprinkle the minced chicken with gravy over your dog's regular food. You can use it for puppies, adult dogs, or senior dogs. As for storage, keep the unopened pouches in a cool, dry place. Once opened, if there's any leftover, store it in the fridge and use it within a day or two. Make sure to check the expiration date on the pouch. And remember, while this topper is a great addition to your dog's diet, it should be part of a balanced meal.