Like many dog breeds, Rottweilers were initially bred to herd large animals, pull carts, and serve as security dogs.

 became popular family dogs, breeders selectively bred out their tough, hunting personalities to make them the gentle,

The Siberian husky is a direct descendant of the Chukchi dog and still has incredible strength, speed, and endurance.

German shepherds often serve as guide dogs for the blind or service dogs, search dogs, and military police dogs.

Don't let their shorter stature fool you. Bulldogs are extremely strong, powerful dogs due to their history as fighting dogs.

Saint Bernard or St. Bernard is a breed of very large working dog from the Western Alps in Italy and Switzerland.

They are similar to other arctic, husky, and spitz breeds such as the Greenland Dog, Canadian Eskimo Dog,

The U.S. Marine Corps selected Doberman as its official dog during World War II for its athleticism and endurance.

The Rhodesian Ridgeback is a large scenthound and sighthound dog breed bred in the Southern Africa region.

The Chow Chow is a spitz-type of dog breed originally from northern China. The Chow Chow is a sturdily built dog,