To use this Eukanuba dry dog food for large breed puppies, simply serve it in your puppy's food bowl. The amount you should feed depends on your puppy's age, weight, and activity level. Check the feeding guide on the package for detailed portion recommendations. As for storage, keep the bag tightly closed in a cool, dry place to maintain freshness. When transitioning your puppy to this food, do it gradually over about a week. Start by mixing a small amount of the new food with your puppy's old food and gradually increase the proportion of the Eukanuba food. If your puppy has any special dietary needs or health concerns, it's always a good idea to consult your vet.