To use this dog food, simply serve it to your large breed adult dog according to the feeding guidelines on the bag, which are based on your dog's age, weight, and activity level. Make sure your dog has access to fresh water at all times. Remember, this food is not for large breed puppies, pregnant, or nursing dogs. If you have a pregnant or nursing dog, switch her to Hill’s Science Diet Puppy Large Breed. Store the 35 lb bag in a cool, dry place to keep the food fresh. Once opened, close the bag tightly after each use to prevent spoilage. If you notice any changes in your dog's health or behavior after starting this food, consult your veterinarian.