Using these dental sticks is easy. Just give one to your dog to chew on. It'll help clean their teeth and freshen their breath. As for the amount, follow the feeding guidelines according to your dog's size. Remember to always have fresh water available for your dog when they're chewing the stick. Store these dental sticks in a cool, dry place to keep them fresh. If your dog has any special dental or health issues, it's a good idea to consult your vet before starting them on these sticks.