The Bullmastiff

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The Bullmastiff is a large working breed that originated in England in the mid-1800s. Bred by gamekeepers as estate guardians, they were developed to track, pin, and hold poachers without mauling them.

To achieve this, breeders crossed the Old English Bulldog of the 19th century — a strong and fearless type — with the Mastiff, known for its power and steadiness.
The result was the Gamekeeper’s Night Dog: powerful, reliable, and deeply loyal.

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Breed Overview

Bullmastiffs are strong, muscular, and intelligent, with a calm, confident temperament. They combine the power of the Mastiff with the determination and alertness of the Bulldog.

• Group: Working

• Origin: England

• Purpose: Estate guardian / family protector

• Average Height:

  • Males: 25–27 inches (64–69 cm)

  • Females: 24–26 inches (61–66 cm)

• Weight:

  • Males: 110–130 lbs (50–59 kg)

  • Females: 100–120 lbs (45–54 kg)

• Coat Colors: Fawn, red, or brindle

• Coat Type: Short, dense, weather-resistant

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Temperament

Despite their size, Bullmastiffs are known for their gentle and affectionate nature. They are devoted, calm, and intelligent companions who form strong bonds with their families.

They are natural protectors — alert and fearless when needed — yet typically quiet and reserved indoors.
They’re wonderful with children when raised in a loving, structured environment, though supervision is always recommended due to their size and strength.

Bullmastiffs are loyal to their core — they live to please their people.

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 Training & Socialization

Bullmastiffs respond best to positive, consistent training and firm but kind leadership. They are eager to please but can be independent thinkers, so early socialization and obedience work are key.

Expose them to new sights, people, and situations early in life to encourage confidence and good manners.

They are not a “high-drive” breed — short, focused sessions work better than repetitive drills.

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Exercise & Lifestyle

• Exercise Requirements: About 40 minutes per day of moderate activity

• Energy Level: Low to moderate

• Best For: Homes with fenced yards, moderate activity lifestyles

• Indoor Traits: Calm, affectionate, and loves family time

They are happiest when part of daily life — whether lounging nearby, going for walks, or joining family activities.

 

 Health & Care

• Life Expectancy: 8–10 years

• Health Considerations: Hip and elbow dysplasia, heart conditions, hypothyroidism, cancer, and bloat (gastric torsion).

• Preventive Care: Routine vet checks, joint supplements, and maintaining a healthy weight are essential.

Grooming is simple — a weekly brush to remove dead hair, regular nail trims, and ear cleaning are all they need.
They are moderate shedders and known for drooling and snoring, part of their lovable charm.

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Breed Expectations

TraitLevel / Description

Exercise Needs~40 minutes daily

Energy LevelLow to moderate

Drooling - High

Snoring - High

Barking - Low

Digging - Low

Social Needs - Moderate

TrainabilityModerate (requires firm consistency)

 

 Family Companion & Guardian

Bullmastiffs make exceptional family dogs — loyal, patient, and intuitive.
They protect without unnecessary aggression, and their calm presence brings a sense of peace and safety to the home.

With love, structure, and socialization, they become not just pets but true members of the family — living symbols of courage, devotion, and heart.