Bullmastiff vs Mastiff

Trying to decide between the Bullmastiff and the Mastiff? Both are popular choices, but they suit different homes and lifestyles. This side-by-side comparison breaks down temperament, size, grooming, exercise needs and family-friendliness so you can see exactly how the Bullmastiff and Mastiff differ — and which one is the better match for you.

Bullmastiff vs Mastiff: full comparison

TraitBullmastiffMastiff
SizeLargeGiant
Energy levelLowLow
TrainabilityMediumMedium
FriendlinessHighHigh
Good with childrenHighVery High
Grooming needsVery LowLow
SheddingMediumMedium
BarkingLowLow
ProtectivenessVery HighHigh
AdaptabilityMediumLow
Typical lifespan9 years8 years
HypoallergenicNoNo

Key differences at a glance

Which should you choose?

Choose the Bullmastiff if you want a more protective, watchful guardian, you want a more adaptable dog, or you prefer lower grooming upkeep.

Choose the Mastiff if you want the more child-friendly companion or you want a bigger, more substantial dog.

Not sure which breed is right for you?

Take the DoggyQ quiz and get a personalised match from 200+ breeds based on your lifestyle, home and preferences.

Find your perfect match Try the free quiz

Frequently asked questions

Is the Bullmastiff or the Mastiff better for families with children?
The Mastiff tends to be the more naturally child-friendly of the two, though both can do well in family homes with early socialisation.
Which sheds more, the Bullmastiff or the Mastiff?
The Bullmastiff and Mastiff shed a similar amount (medium).
Which is easier to train, the Bullmastiff or the Mastiff?
Both breeds have comparable trainability. Consistency and positive reinforcement work well for each.

Related guides