A Leonberger, which has a mane resembling a lion's, makes an excellent watchdog and versatile working dog.
Dogue de Bordeaux
The Dogue de Bordeaux, another strong guard dog, is renowned for its expressive face and eyes and has the largest proportionate head of any breed.
The Bullmastiff, also referred to as "the Gamekeeper's Night Dog," is the best type of security dog. The breed was created in the 19th century to protect country estates and exclusive English wildlife preserves.
Black Russian Terrier
These enormous terriers are as intelligent as they are imposing. The Soviet Union developed the Black Russian Terrier in the 1930s to produce a formidable security dog.
Bernese Mountain Dog
One of the more well-known big breeds is the Bernese Mountain Dog, which has an eye-catching tri-colored coat.
The size of this regal breed is remarkable, and its (typically) long white coat makes it simple to identify.
An alert and intimidating dog, the Cane Corso is a loyal, strong breed. The first Cane Corso was imported to America in 1988.
Large and majestic, the Irish Wolfhound is the tallest breed of dog recognized and was originally bred as a big-game hunter.
The Anatolian Shepherd is a strong-willed, devoted, and territorial working dog. This breed, which weighs 150 pounds, was created to guard livestock.
Great Danes, one of the most iconic big breeds, were bred to defend and kill wild boars.