The “king of terriers,” the Airedale is friendly and exuberant—sometimes seeming to have no “off” switch, according to VetStreet.com.
The Tibetan mastiff, bred in the Himalayas to guard people as well as livestock, is one of the best guard dogs around.
The Caucasian shepherd goes by many names, including Russian bear dog, Caucasian Ovcharka, Caucasian mountain dog, and Caucasian sheepdog.
This stocky, curly-tailed Japanese mountain dog is revered in its native country as a symbol of good health and long life, according to the AKC.
American Staffordshire terrier
The AmStaff, which is one of several types of pit-bull dogs, is affectionate, playful, and energetic.
The breed has the size and strength to be good at it, and the added benefit of being resistant to pain, WagWalking.com notes.
Hailing from Switzerland, these medium-sized mountain dogs are cheerful, smart, and energetic.
Long used in police work, this dog breed achieved a moment of fame when one named Cairo helped Navy SEAL Team 6 take down Osama bin Laden in 2011.
This massive dog was bred as a kind of “superdog” for the Russian army in the 1930s, according to the AKC.
Black Russian terrier
You might not know it by looking at them, but Beaucerons, which strongly resemble Doberman pinschers, are actually the largest of all the French sheepdogs,