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The 8 Largest & Heaviest Dog Breeds In The World

By: Ejay Camposano
A college graduate with a degree in Electrical Engineering, Ejay has a diverse background that combines technical expertise with a passion for pets and is now one of the content writers at IHD. Read more
| April 6, 2024

In the diverse and expansive world of canine breeds, size truly matters for those who favor the company of giant dogs. The largest and heaviest dog breeds in the world are revered not only for their imposing presence but also for their unique temperaments, historical roles, and the special care they require. These colossal canines have served various purposes throughout history, from guarding flocks to noble companionship, and continue to fascinate dog lovers today. This article explores the 8 largest and heaviest dog breeds, delving into their characteristics, origins, and what makes each of them stand out as gentle giants of the dog world.

1. English Mastiff

The English Mastiff is often considered the epitome of giant dog breeds, holding records for both weight and size. With a history dating back to ancient times, these majestic dogs were used as war dogs and guardians. Today, they are known for their gentle temperament and loyal nature. Despite their intimidating size, English Mastiffs are affectionate with their families and have a calm demeanor. They require space to accommodate their massive build and benefit from gentle exercise to maintain their health. Proper nutrition is crucial for this breed, as they can weigh anywhere from 150 to 250 pounds or more, with some individuals tipping the scales at even greater weights.

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2. Saint Bernard

Saint Bernards are famous for their role as rescue dogs in the Swiss Alps, a testament to their strength, endurance, and gentle nature. These dogs are giants, with adults typically weighing between 140 to 180 pounds. Saint Bernards possess a kind and patient demeanor, making them excellent family pets. Their thick, dense coat requires regular grooming, and they thrive in cooler climates. Despite their size, they are known to be gentle with children and other pets. Early training and socialization are important to manage their size as they grow.

3. Great Dane

Great Danes are known as the “Apollo of Dogs” for their grace, nobility, and towering height. They hold the record for the tallest dog breed, with some individuals standing over 30 inches at the shoulder. Despite their imposing stature, Great Danes are friendly, affectionate, and surprisingly gentle. They were originally bred to hunt wild boar and guard estates, but today they are beloved companions. Great Danes require ample space to move and a moderate amount of exercise to stay healthy. Their short coat is low maintenance, but owners should be mindful of health issues common to large breeds.

4. Irish Wolfhound

The Irish Wolfhound, once used for hunting wolves and elk, is one of the tallest dog breeds. They are known for their gentle and friendly nature, often referred to as gentle giants. Despite their historical role as fierce hunters, Irish Wolfhounds are incredibly patient and kind, making excellent companions. They need regular exercise to maintain their health but are relatively laid-back indoors. Their rough coat requires regular grooming. Socialization is key for this breed to ensure they grow up well-adjusted.

5. Newfoundland

Newfoundlands are known for their incredible strength, swimming ability, and sweet disposition. Originating from Canada, they were used by fishermen and excelled at water rescue due to their muscular build and webbed feet. Newfoundlands are true gentle giants, known for their patience and protective nature toward children. They have a thick, water-resistant coat that requires regular grooming. Despite their size, they are one of the kindest and most gentle breeds, making them excellent family pets. Newfoundlands thrive in homes where they can receive plenty of love and attention.

6. Leonberger

The Leonberger is a breed that combines the best traits of its ancestors, the Saint Bernard, Newfoundland, and Great Pyrenees. They were bred to resemble the lion in the town crest of Leonberg, Germany. These dogs are known for their friendly and gentle nature, making them excellent companions. Leonbergers are versatile, excelling in water rescue, therapy work, and as family pets. Their long, dense coat requires regular grooming, and they benefit from regular exercise. Despite their size, they are incredibly gentle with children and other pets.

7. Tibetan Mastiff

The Tibetan Mastiff is an ancient breed known for its imposing presence and independent nature. Originally bred by nomads of Tibet to protect sheep from predators, they are incredibly strong and have a thick, double coat. Tibetan Mastiffs are known for their loyalty and protective instincts, making them excellent guard dogs. They are aloof with strangers but deeply loyal to their families. This breed requires an experienced owner who can provide firm, consistent training. Tibetan Mastiffs are less active than some other large breeds but still require regular exercise.

8. Anatolian Shepherd

The Anatolian Shepherd is a breed that originates from Turkey, where they were used to guard livestock. These dogs are known for their intelligence, independence, and protective instincts. Anatolian Shepherds are large and muscular, with a short to medium-length coat. They are vigilant and can be reserved with strangers, making them excellent guard dogs. Despite their working background, they are affectionate with their families and can adapt to family life if given enough space and exercise. Early socialization and training are crucial for this breed.

The largest and heaviest dog breeds in the world offer a unique combination of strength, loyalty, and gentleness. From the historic English Mastiff to the vigilant Anatolian Shepherd, each breed brings its own set of traits that make them fascinating companions. Owners of these gentle giants should be prepared to provide ample space, proper nutrition, regular grooming, and gentle exercise to keep them healthy and happy. Despite their imposing size, these breeds are known for their kind-hearted nature, proving that sometimes, the biggest dogs have the softest hearts.