The Bullmastiff is a British breed of

dog The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the wolf. Also called the domestic dog, it is derived from the extinct Pleistocene wolf, and the modern wolf is the dog's nearest living relative. Do ...

mastiff A mastiff is a large and powerful type of dog. Mastiffs are among the largest dogs, and typically have a short coat, a long low-set tail and large feet; the skull is large and bulky, the muzzle broad and short ( brachycephalic) and the ears dr ...

type and large size, with a solid build and a short muzzle. It was developed as a

guard dog A guard dog or watchdog (not to be confused with an attack dog) is a dog used to watch for and guard property against unwanted or unexpected human or animal intruders. The dog is discerning so that it does not annoy or attack the resident hum ...

in the nineteenth century by

cross-breeding A crossbreed is an organism with purebred parents of two different breeds, varieties, or populations. ''Crossbreeding'', sometimes called "designer crossbreeding", is the process of breeding such an organism, While crossbreeding is used to main ...

the English Mastiff with the now-extinct

Old English Bulldog The Old English Bulldog is an extinct breed of dog. Physical characteristics The Old English Bulldog was compact, broad and muscular, as reflected in the painting '' Crib and Rosa''. Through John Scott's engraving, this painting became th ...

. It was recognised as a breed by

The Kennel Club The Kennel Club ("KC") is the official kennel club of the United Kingdom. It is the oldest recognised kennel club in the world. Its role is to oversee various canine activities including dog shows, dog agility and working trials. It also oper ...

in 1924.

History

The origins of the Bullmastiff are unclear. In the eighteenth century, in some regions of England, the Old English Mastiff and English Bulldog were commonly inter-bred to produce dogs suitable for work guarding people and their property. By the beginning of the twentieth century this cross-breed was in widespread use as an aid to

gamekeeper A gamekeeper (often abbreviated to keeper), or in case of those dealing with deer (deer-)stalker, is a person who manages an area of countryside (e.g. areas of woodland, moorland, waterway or farmland) to make sure there is enough game for s ...

s in the control of

poaching Poaching has been defined as the illegal hunting or capturing of wild animals, usually associated with land use rights. Poaching was once performed by impoverished peasants for subsistence purposes and to supplement meager diets. It was set a ...

. They were bred by gamekeepers for strength, size and speed using a cross of the tough, heavy and aggressive

Bulldog The Bulldog is a British breed of dog of mastiff type. It may also be known as the English Bulldog or British Bulldog. It is of medium size, a muscular, hefty dog with a wrinkled face and a distinctive pushed-in nose.Mastiff A mastiff is a large and powerful type of dog. Mastiffs are among the largest dogs, and typically have a short coat, a long low-set tail and large feet; the skull is large and bulky, the muzzle broad and short ( brachycephalic) and the ears dr ...

.Walkey B. The Bullmastiff Fancier's Manual. Sechelt B.C., Canada: Coast Arts Publishing; 1992 As a result, the Bullmastiff is known as the Gamekeeper's Night Dog. The Bullmastiff was recognised as a breed by

in 1924. Dogs had to have a minimum of four generations of descent from Bullmastiff stock without input from either Bulldog or Mastiff; cross-bred animals could not be registered. The American Kennel Club recognised it in 1934. It was definitively accepted by the Fédération Cynologique Internationale in 1955. In 1928, the diamond mining company De Beers imported Bullmastiffs to South Africa to guard the mines.

Appearance

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The Bullmastiff is a large dog. Bitches stand some at the

withers The withers is the ridge between the shoulder blades of an animal, typically a quadruped. In many species, it is the tallest point of the body. In horses and dogs, it is the standard place to measure the animal's height. In contrast, cattle a ...

, and usually weigh ; on average, dogs stand about taller and weigh more. The coat may be fawn, red or brindle, in any shade; some limited white marking on the chest is allowed. The muzzle is black, becoming paler towards the eyes. It is a

brachycephalic Brachycephaly (derived from the Ancient Greek '' βραχύς'', 'short' and '' κεφαλή'', 'head') is the shape of a skull shorter than typical for its species. It is perceived as a desirable trait in some domesticated dog and cat breeds, ...

dog, flat-faced and short-muzzled, but this does not affect its breathing.Brachycephalic dogs
The Kennel Club.

Health

A UK survey based on the lifespan of 96 Bullmastiffs found a median age of 7.5 years. Health concerns within the breed include hip and elbow dysplasia, progressive retinal atrophy, bloat, and cancer, with a relatively high incidence of lymphoma and mast cell tumours. Bullmastiffs are prone to certain hereditary diseases, including: *

Hip dysplasia Hip dysplasia is an abnormality of the hip joint where the socket portion does not fully cover the ball portion, resulting in an increased risk for joint dislocation. Hip dysplasia may occur at birth or develop in early life. Regardless, it doe ...

, affecting 24.5% of individuals *

Elbow dysplasia Elbow dysplasia is a condition involving multiple developmental abnormalities of the elbow-joint in the dog, specifically the growth of cartilage or the structures surrounding it. These abnormalities, known as 'primary lesions', give rise to os ...

, affecting 13.8% of individuals, *

Entropion Entropion is a medical condition in which the eyelid (usually the lower lid) folds inward. It is very uncomfortable, as the eyelashes continuously rub against the cornea causing irritation. Entropion is usually caused by genetic factors. This is d ...

, hypothyroidism affecting 2.8% of individuals, *

Lymphoma Lymphoma is a group of blood and lymph tumors that develop from lymphocytes (a type of white blood cell). In current usage the name usually refers to just the cancerous versions rather than all such tumours. Signs and symptoms may include enla ...

* Progressive retinal atrophy is a particular problem, since the trait is an autosomal dominant one. (This has recently been called into question by another medical team and has been proven that some Bullmastiffs have autosomal recessive PRA genes. In America, this is being investigated by the American Bullmastiff Health and Research Committee, and the DNA Optigen test only works for dominant genes, so it is considered inadequate at this time.)

References

{{Authority control FCI breeds Dog breeds originating in England Mastiffs

History

Appearance

Health

See also

References