Bullmastiff

Working Group

Bullmastiff dog lying down in front of white background

Height at Shoulders

Females 24-26 in, Males 25-27 in

Weight

Females 100-120 lbs, Males 110-130 lbs

Life Expectancy

7-9 yrs

History

The Bullmastiff, nicknamed "the Gamekeeper's Night Dog", was developed in England during the 19th century to reduce poaching on estates. The huge estates owned by aristocrats had a plethora of game animals, which enticed many poachers. During this time, the penalty for poaching on estates was often the death sentence, giving poachers a huge motivation to not get caught. Generally, if they were to be confronted by a gamekeeper, their response would be to fight rather than willingly accept their fate through the legal system.  The estate gamekeepers needed backup, so they bred Bullmastiffs, which are approximately 60% Mastiff, 40% Bulldog. The traits they selected for included strength, stamina, and bravery to chase and pin down poachers without actually hurting them. Today, Bullmastiffs are employed as household guardians because of their gentle, family-oriented temperament.

Breed Characteristics

While not all Bullmastiffs will display the exact characteristics typical of the breed, most share a personality and temperament can be generalized by the characteristic rankings below. 

Intelligence

Affection Towards Family

Friendliness Towards Strangers

Friendliness Towards Other Dogs

Exercise Needs

★★★☆☆

★★★★★

★★★☆☆

★★★★☆

★★★☆☆

Energy Level

Sensitivity

Noise Level

Prey Drive

Shedding

★☆☆☆

★★★★☆

★☆

★☆

★☆☆☆

Intelligence

★★★


Affection Towards Family

★★★★★


Friendliness Towards Strangers

★★★


Friendliness Towards Other Dogs

★★★★☆


Exercise Needs

★★★☆☆


Energy Level

★☆☆☆


Sensitivity

★★★★☆


Noise Level

★☆


Prey Drive

★☆


Shedding

★☆☆☆

Common Traits

Courageous, confident, and protective- even when wary of someone, generally only bite as a last resort

Prone to flatulence and heavy drooling

Low-key and calm but still comical once they grow out of puppyhood

Have high pain tolerance so might be hard to tell if they're hurt

Independent and can be comfortable left alone all day if given a few hours of love and attention at night