According to this study, short skull breeds, including beagles, Chihuahuas and Yorkshire terriers, are more likely to have two rows of teeth. These dogs' skulls are short and wide, which leads to small tooth spacing and easy to form double rows of teeth between the upper and lower jaws.

In addition, these dogs may also have the problem of blocked teeth. Therefore, while nursing the dog's mouth every day, the owner should pay attention to whether the teeth grow in double rows, and seek medical advice in time if there is any problem.

2. Young dogs

The puppy's body is still in the stage of growth and development, and its teeth are gradually growing. Because the dog's teeth have not yet formed a complete dentition, it is easy to cause the distance between the teeth to be small, thus causing the problem of double rows of teeth.

Therefore, it is normal for young dogs to have double rows of teeth, so don't worry too much. In adulthood, it often disappears naturally.

3. Growing environment

The growing environment of dogs will also have an impact on the growth of teeth. If the environment is not good, it will easily lead to tooth deformity. In particular, some dogs that are not well cared for and fed may have various oral problems, including double row of teeth. Therefore, while keeping dogs, people need to pay attention to their oral hygiene and provide them with a balanced diet.

4. Genetic factors

Double row of teeth may also be the manifestation of some hereditary diseases, such as hereditary tooth deformity and other symptoms. If you find that your dog's teeth grow abnormally, you can not only pay more attention to it in daily care, but also go to a professional pet hospital for examination to find out whether your dog has genetic diseases.