Illustration of Bullmastiff
Dogs

Bullmastiff

The Bullmastiff is a British guardian breed — a large, powerful dog bred to be quiet, fast and imposing without being savage.

History

It was developed in nineteenth-century England by gamekeepers, who crossed the Mastiff with the Bulldog to make a "gamekeeper's night dog" that could track poachers in the dark and pin them without mauling. That guarding purpose shaped its build and its temperament.

Temperament

The breed is known for being calm, confident and devoted, reserved with strangers but gentle with its family. Its size and protectiveness make early socialising and steady handling essential.

Care and training

It needs moderate daily exercise and firm, reward-based training suited to a strong dog. The short coat is easy, but the flat-ish face means heat should be managed with care.

Health

Known tendencies include hip and elbow dysplasia, bloat and a higher cancer risk, and like other giants it lives a shorter life on average. These are patterns for the breed rather than a verdict on one dog; the measured facts are in the panel.

Characteristics

Origin
United Kingdom
Size
Giant
Weight
50–59 kg
Height
64–69 cm
Lifespan
7–9 yr
Coat
Short
Group
Working

Where this data comes from

Traits

Affection
Energy
Intelligence
Shedding
Grooming
Good with kids

Similar breeds

Dogs with a comparable size, coat and temperament.

Dog and cat breeds