You don't want your little puppy inadvertently injured or traumatized by a larger breed puppy during play. Play gentle games with your small dog. Don't play tug of war - not only is it the beginning of aggression training but a small dog can be swung around on a tug toy and injured. Ask your veterinarian to teach you to brush your small dog's teeth. Little dogs have crowded mouths and terrible dental problems.
Dirty teeth can cause other health problems.
Only use the flavored toothpaste that's made especially for dogs. Human toothpaste can cause digestive upsets if it's swallowed. Click on the cover to order now. It was only 2 million years ago that they started to evolve into the very different creatures we recognize today. Early people so admired these creatures that they invited them to share their lives.