Using this Royal Canin dry dog food for your Chihuahua puppy is easy. Just measure out the right amount according to your puppy's age and weight as recommended on the package. Feed it to your puppy at regular intervals throughout the day. Make sure your puppy always has access to fresh water. When you first start feeding this food, gradually mix it with your puppy's old food over a few days to avoid any digestive upset. Store the food in a cool, dry place and keep the bag tightly sealed. If you notice any unusual behavior or health issues with your puppy after starting this food, consult your veterinarian.