This toothbrush is an authentic tiny head toothbrush developed to polish a very small dog. In order to brush the back teeth of dogs less than 5.5 lbs (2.5 kg), the brush part has a smaller head with a thickness of about 0.4 inches (10 mm). Considering the shape of your dog's mouth, the brush part is 15° inclined to the handle for better maneuverability and effectively removes plaque from the teeth. In addition to protecting the health of your beloved dog's teeth while meeting with "Dog Mouth Care", we hope that the owner will be able to reconsider their own dental care.