Coming in last on the list is also one of the largest—the Bernese Mountain Dog. This breed originates in the Alps of Switzerland—the Bernese Alps, to be exact—and was bred as a strong working dog capable of pulling 1,000 pounds. This breed was officially recognized by the American Kennel Club in 1937.
The Bernese Mountain Dog can grow up to about 115 pounds and has a life expectancy of 7-10 years. This breed thrives in cold environments, no surprise there, and will get along with the entire family.