The biggest dog breed: English Mastiff
According to the American Kennel Club, the biggest dog breed is the English Mastiff, also known as the Old English Mastiff. Mastiffs are considered the heaviest dog breed, but not necessarily the tallest. They can weigh anywhere from 110 pounds to 343 pounds. The height of a mastiff can range from 25 inches at the shoulder to 36 inches.
In 1989, Zorba, an English Mastiff, broke records as the heaviest and tallest dog ever, with a weight of 343 pounds. Zorba measured over 8 feet from nose to tail and was said to be about the size of a small donkey. Hercules, a 282-pound English mastiff with a 38-inch neck, cinched the record in 2001 for World’s Heaviest Dog.
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Runners-up: Neapolitan Mastiff
Neapolitan Mastiffs are fearless and extremely protective companions. They measure approximately 26 to 31 inches at the withers. Usually weighing about 170 pounds, Neapolitan Mastiffs can also reach up to 200 pounds.
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Runners-up: Irish Wolfhound
Irish Wolfhounds are said to be the world’s tallest dog breed. Historically, the Irish Wolfhound’s astonishing size, speed, and intelligence made them ideal animals for hunting wolves and boars, though they are quite docile and friendly in nature. With a robust and muscular build, males can attain the stature of a small pony. The Irish Wolfhound can reach up to seven feet tall when standing on its hind legs and weigh 90 to 150 pounds.
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