Shark-like extra teeth are more common in small dogs

Seven percent of pet dogs (mostly small “toy” breeds) have double teeth reminiscent of shark mouths. This condition, known as persistent deciduous teeth, occurs when a dog's baby teeth do not fall out and remain fixed in the jaw near the adult teeth, forming a dentition similar to that seen in sharks. To do.

To investigate this “shark tooth”, colin wallis He and his colleagues at the Waltham Institute of Pet Care Science in Leicestershire, England, looked at the records of 2.8 million purebred dogs in the country.