NEW YORK, NY - FEBRUARY 12: Green the Chow Chow sits in the grooming area at the 142nd Westminster Kennel Club Dog Show at The Piers on February 12, 2018 in New York City. The show is scheduled to see 2,882 dogs from all 50 states take part in this year's competition. (Photo by Drew Angerer/Getty Images)

While you probably know exceptions to the breeds on this list, some dogs are more dangerous simply based on their size and force of their jaws.

Dogs have long been known as man’s (and woman’s) best friend. Canines are loyal and lovable, and they often provide comfort, protection and other services to their human counterparts. However, they can also be dangerous.

Depending on the animal’s upbringing, temperament and circumstances, any dog can be a threat. Even small dogs might bite someone. In fact, chihuahuas sink their teeth into vets more often than any other type of pooch.

But certain breeds can cause greater harm simply because of their size or the force of their jaws. Based on the damage they can do, these are some of the world’s most perilous pooches, in no particular order.

1St. Bernard

These giant dogs from the Swiss Alps are famous for rescuing people from the snow. They are generally intelligent and friendly animals. However, they can become aggressive in certain situations, especially if they are not properly socialized. Due to their enormous size, this can mean trouble.