Working

Bullmastiff

Gamekeeper’s night dog; massive yet steady, naturally protective and needs calm leadership.

Bullmastiff
ProtectiveGood With KidsHappy In Cold Weather
AKC

Breed snapshot

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Size
Giant
Life
8-10 years
Group
Working
Origin
England

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Primary source
AKC
Open source
Reviewed 2026-04-13

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