Bullmastiffs: What's Good About 'Em, What's Bad About 'Em (2024)

Though usually mild-mannered, the powerful Bullmastiff is also serious and self-assured. He is afraid of nothing, and once aroused will seldom back down.

Bullmastiff puppies (up to two or three years old) can be rambunctious and have an aversion to keeping all four feet on the ground at the same time.

Fortunately, adults are calm and quiet and need only moderate exercise to maintain their impressive muscle tone.

This breed is intensely loyal to his family and doesn't like being left outside. If he doesn't get enough companionship or personal attention, he may walk through fences just to be with people.

Though sensible with strangers, the Bullmastiff does have well-established protective and territorial instincts. He must be thoroughly socialized at an early age so that he learns to distinguish friend from foe.

He can be aggressive with other dogs of the same sex, and though he may be fine with the family cat, strange animals will not be accepted onto his property.

Tremendously strong and stubborn, Bullmastiffs are inclined to do things their own way and will test members of the family. However, he will respond to early, consistent obedience training that includes leadership, cheerful praise, and food rewards.

Overall, he's a splendid, capable companion for assertive owners, but without ongoing time and effort, socialization and supervision, he is too much to handle.

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More traits and characteristics of the Bullmastiff

If I was considering a Bullmastiff, I would be most concerned about...

1. Providing the proper balance of exercise. Young Bullmastiffs need enough exercise to keep them lean and healthy, but not so much that their soft growing bones, joints, and ligaments become over-stressed and damaged. Adult Bullmastiffs need more exercise to keep them in shape, but not in hot or humid weather for fear of overheating. The proper amount of exercise can be difficult to regulate in giant breeds.

   Since you need to minimize their exercise, young Bullmastiffs can be very rambunctious. They will romp with uncoordinated gawkiness all over your house. You need to substitute extra quantities of companionship and supervision during this trying time. Otherwise your young Bullmastiff will become bored and destructive and his powerful jaws can literally destroy your living room.

2. Providing enough socialization. Most Bullmastiffs have protective instincts toward strangers. They need extensive exposure to friendly people so they learn to recognize the normal behaviors of "good guys." Then they can recognize the difference when someone acts abnormally. Without careful socialization, they may be suspicious of everyone – obviously not a good situation!
3. Potential animal aggression. Many Bullmastiffs will not tolerate another dog of the same sex, and some won't tolerate the opposite sex either. Some Bullmastiffs have strong instincts to chase and seize cats and other fleeing creatures. If anything goes wrong in the breeding, socializing, training, or management of this breed, it is capable of seriously injuring or killing other animals.
4. The strong temperament. Bullmastiffs have an independent mind of their own and are not pushovers to raise and train. Many Bullmastiffs are willful and dominant (they want to be the boss) and will make you prove that you can make them do things. You must show them, through absolute consistency, that you mean what you say.

   To teach your Bullmastiff to listen to you, I recommend "Respect Training." Read my free online training programs.

5. Bullmastiff sounds. Because of their short face, Bullmastiffs snort, grunt, and snore loudly. The sounds are endearing to some people; nerve-wracking to others.
6. Slobbering. Most people are not prepared for how much Bullmastiffs slobber and drool, especially after eating or drinking.
7. Gassiness (flatulence). All short-faced breeds gulp air when they eat, and that air has to go somewhere, after all. However, commercial diets make flatulence worse by including fibrous or hard-to-digest ingredients. Bullmastiffs who are fed a heavily meat-based diet have much less trouble with gassiness.
8. Potential health problems. The lifespan of a Bullmastiff is short. An alarming number are crippled by bone and joint diseases and/or succumb to cancer in middle age. Read more about Bullmastiff Health.
9. Potential legal liabilities. Bullmastiffs may be targeted for "banning" in certain areas, or refusal of homeowner insurance policies. Your friends and neighbors may be uncomfortable around this breed. In this day and age, the legal liabilities of owning any breed that looks intimidating and has a history as a guard dog should be seriously considered. People are quicker to sue if such a dog does anything even remotely questionable.

   Frankly, most Bullmastiffs are "too much dog" for the average household. This is a serious working dog with tremendous strength. Very few people really have the ability to manage this breed.