Bullmastiff
Weight
100–130 lbs
Lifespan
7–9
years
Allergies
Standard
coat
See how this breed matches your lifestyle.
Take the quizThe Bullmastiff isn’t quite as large as his close cousin the Mastiff. Still, standing as high as 27 inches at the shoulder and weighing between 100 and 130 pounds, this is still a whole lot of dog. After the first impression made by the Bullmastiff’s size, it is the large, broad head that conveys the breed’s essence: the dark eyes, high-set V-shaped ears, and broad, deep muzzle all combine to present the intelligence, alertness, and confidence that make the Bullmastiff a world-class protector and family companion. Coats come in fawn, red, or brindle.These are biddable and reliable creatures, but as with any large guarding dog, owners must begin training and socialization early, while the puppy is still small enough to control. Fearless at work, docile at home, the Bullmastiff is a large, muscular guarder who pursued and held poachers in Merry Old England—merry, we suppose, for everyone but poachers. Bullmastiffs are the result of Bulldog and Mastiff crosses.
Temperament: Affectionate, Loyal, Brave
RightPup profile built from structured breed data and reviewed against established breed reference sources. Learn more
Best For
Home & Lifestyle Fit
The Bullmastiff is built for an active lifestyle. Daily exercise isn't optional — expect at least 45–60 minutes of real activity, plus mental stimulation through training, puzzle toys, or dog sports. A house with a yard is ideal, though they can adapt to apartments if exercise needs are consistently met.
Day-to-Day Reality
Coat care is minimal: a quick brush and occasional bath keeps them looking their best. Shedding is average — manageable with regular brushing. This breed craves human company. Long days alone can lead to anxiety or destructive behavior, so a work-from-home setup or doggy daycare is worth planning for.
Things to Know First
- Needs substantial daily exercise and space — not suited to small homes
- Higher food, equipment, and veterinary costs due to size
- Prone to separation anxiety if left alone for long periods
Good Fit If
- Owners who enjoy training and teaching new skills
- Active households with outdoor activities like hiking or running
Not Ideal If
- Small apartments without nearby exercise options
- Owners who work long hours without a plan for the dog during the day
Breed Traits
Breed Highlights
- Good with Kids: Good (3/5)
- Good with Dogs: Good (3/5)
- Low Shedding: Good (3/5)
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