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Bullmastiff vs. English Mastiff: What's the Difference?

Edited by Janet White || By Harlon Moss || Updated on October 4, 2023
The Bullmastiff is a cross between a Bulldog and a Mastiff, known for its protective nature, while the English Mastiff is one of the largest dog breeds characterized by its gentle temperament.

Key Differences

The Bullmastiff is a breed that originated from the crossbreeding of the Bulldog and the Mastiff, resulting in a dog that has a blend of both parent breeds' physical and temperamental characteristics. In contrast, the English Mastiff is not a crossbreed and has a distinct lineage tracing back to ancient times, known for its massive size and gentle nature.
In terms of appearance, the Bullmastiff is a solidly built dog with a short muzzle, resembling its Bulldog ancestry. The English Mastiff, on the other hand, is one of the heaviest breeds, possessing a large head and a more elongated muzzle.
Behaviorally, the Bullmastiff is known for its protective and alert nature, often serving as a guard dog. The English Mastiff, despite its imposing size, is generally docile, laid-back, and good-natured, making it a gentle giant.
The Bullmastiff tends to be more active and requires consistent training to manage its protective instincts. In contrast, the English Mastiff is more relaxed and, while still needing proper socialization, tends to be less aggressive.
Both the Bullmastiff and the English Mastiff require consistent care, attention, and training. However, their dietary and exercise needs may differ due to their varying energy levels and physical builds.

Comparison Chart


Crossbreed (Bulldog and Mastiff)
Ancient breed


Medium to large
One of the largest breeds


Protective and alert
Gentle and docile

Physical Appearance

Short muzzle, resembles Bulldog
Long muzzle, massive build


Often used as a guard dog
Historically a war dog, now a companion

Bullmastiff and English Mastiff Definitions


A dog known for its strong build and keen guarding instincts.
A Bullmastiff is often recommended for experienced dog owners.

English Mastiff

A massive dog breed with a gentle disposition and deep historical roots.
An English Mastiff can be a gentle and loving addition to any household.


A medium to large-sized breed with a distinctive short muzzle.
The Bullmastiff has a powerful appearance but is often affectionate with its family.

English Mastiff

A dog with a powerful build and a calm, laid-back temperament.
While big, the English Mastiff is often great with children and other pets.


A protective and courageous breed often used in security roles.
Despite its tough exterior, a Bullmastiff can be a loving family pet.

English Mastiff

A breed renowned for its loyalty, size, and protective instincts.
Despite its size, an English Mastiff needs a lot of love and care.


A breed resulting from the crossbreeding of the Bulldog and the Mastiff.
The Bullmastiff is renowned for its loyalty and protective nature.

English Mastiff

One of the largest and oldest dog breeds known for its gentle nature.
An English Mastiff may look intimidating, but it's a true gentle giant.


A dog breed that combines the best of the Bulldog and Mastiff characteristics.
Training a Bullmastiff requires consistency due to its strong-willed nature.

English Mastiff

A breed characterized by its massive size and long history.
The English Mastiff has been depicted in ancient artworks and writings.


A large, heavy-set, powerful dog of a breed developed from the bulldog and the mastiff.


Alternative case form of Bullmastiff


How large can an English Mastiff get?

The English Mastiff is one of the largest dog breeds, often weighing over 200 pounds.

How much does an English Mastiff eat?

Given their size, English Mastiffs have significant dietary needs but it's essential to avoid overfeeding and monitor their weight.

Are Bullmastiffs good for first-time dog owners?

It's recommended that Bullmastiffs be owned by those with some experience due to their strong protective instincts.

Are Bullmastiffs aggressive?

Bullmastiffs are protective and can be assertive but are not naturally aggressive without reason.

Which breed is older, Bullmastiff or English Mastiff?

The English Mastiff has a longer historical lineage compared to the Bullmastiff.

Do Bullmastiffs get along with other pets?

With proper socialization, Bullmastiffs can get along with other pets.

Are Bullmastiffs easy to train?

Bullmastiffs are intelligent but can be stubborn, requiring consistent training.

Do English Mastiffs require a lot of exercise?

While they need regular walks, English Mastiffs are not as active as some other breeds.

What is the typical lifespan of a Bullmastiff?

Bullmastiffs typically live between 8-10 years.

Is the Bullmastiff a purebred?

No, the Bullmastiff is a crossbreed of the Bulldog and Mastiff.

What's the main difference between a Bullmastiff and an English Mastiff?

The main difference is the Bullmastiff's crossbreed origins and more protective nature, while the English Mastiff is a pure breed known for its gentle temperament.

Are Bullmastiffs and English Mastiffs related?

Yes, the Bullmastiff has Mastiff ancestry due to its crossbreeding origins.

Do Bullmastiffs drool a lot?

Yes, like many large breeds, Bullmastiffs can be prone to drooling.

How does the temperament of an English Mastiff compare to other large breeds?

The English Mastiff is generally more docile and laid-back compared to other large breeds.

What is the origin of the Bullmastiff?

The Bullmastiff originated from crossbreeding the Bulldog and the Mastiff.

Is the Bullmastiff a good family dog?

Yes, the Bullmastiff can be a good family dog but requires consistent training due to its protective nature.

How much space does an English Mastiff need?

Due to its size, the English Mastiff benefits from having ample space but can adapt to smaller spaces if exercised regularly.

What are common health issues for English Mastiffs?

English Mastiffs can face issues like hip dysplasia, heart conditions, and bloat.

How often should an English Mastiff be groomed?

English Mastiffs have short coats, so regular brushing and occasional baths should suffice.

Are English Mastiffs good with kids?

Yes, English Mastiffs are generally gentle and patient with kids.
About Author
Written by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.
Edited by
Janet White
Janet White has been an esteemed writer and blogger for Difference Wiki. Holding a Master's degree in Science and Medical Journalism from the prestigious Boston University, she has consistently demonstrated her expertise and passion for her field. When she's not immersed in her work, Janet relishes her time exercising, delving into a good book, and cherishing moments with friends and family.

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