Using this cat food is easy. Just fill your cat's dish with the appropriate amount according to her age, weight, and activity level. Make sure to provide fresh water at all times. As for storage, keep the bag in a cool, dry place. If the bag is opened, seal it tightly after each use to maintain freshness. Note that it might take up to three weeks to see the allergen - reducing effects. If your cat has any pre - existing health conditions, it's a good idea to consult your vet before switching to this food. Overall, this cat food is a great way to support your cat's health and reduce allergens in your living space.