Large, powerful guardian breed with short coat and calm, confident demeanor, originally bred to guard estates and known as 'The Gamekeeper's Night-Dog'
Developed in mid-19th century England by gamekeepers crossing English Mastiff with Old English Bulldog to create an effective estate guard dog for tracking poachers
Males typically weigh 50-59 kg and stand 64-69 cm at the shoulder; females 45-54 kg and 61-66 cm.
“Powerful; enduring, active and reliable. High-spirited, alert and faithful”
Quoted from FCI standard n°157. It describes the breed the registry recognises, not any individual animal.
Breed reference from The Dog API.
Drawn from sources rather than written as an opinion — cited health research, the registry’s own standard, and peer-reviewed longevity. FCI breed standard; McMillan et al. 2024, median age at death. One breeder’s animals can differ from any of it, and an empty column means we hold nothing for that side rather than that there is nothing to say.
FCI standard · Bullmastiff
As the FCI standard sets it out. Every line below is the standard’s own wording, tagged permissible and undesirable.
Long, silky or woolly coats highly undesirable
Preferred, permissible, undesirable and disqualifying are FCI’s own words about the breed. They describe what the standard asks for — not an assessment of any individual dog, and not ours.
Base colour
Any shade of brindle, fawn or red
Shortened from FCI standard n°157 — each label is the standard’s own wording with the verdict lifted into the tag beside it. Read the full clause at source.
Breed-level information from The Dog API. It describes the Bullmastiff in general; any individual animal can differ.
No breed-specific health panel has been written up for the Bullmastiff on this platform yet. That is a gap in our records, not a clean bill of health — ask the breeder which hereditary conditions their lines are tested for, and ask to see the results for both parents, dated and from a named laboratory.
This is where Bullmastiff owners’ own photographs will go, from the pet profiles they keep here. Nobody has added one to a public page yet.
A photograph in a pet profile stays private to its owner. We will not put one here unless they ask us to.
No Bullmastiff breeder has a record on this platform yet, so there is nothing to list. That is a gap in our coverage, not a fact about the breed.
