Bullmastiff Dog Breed Information

The Bullmastiff is a powerful, large-boned working dog. Its looks reflects its origins as a mix between a Mastiff and a bulldog. This breed has a sharp, attentive, and devoted attitude. Though the Bullmastiff has an inherent protective drive, the breed is usually extremely gentle around children and other non-threatening individuals.



The Bullmastiff breed originated in England around the mid-1800s. Cross-breeding was tried by gamekeepers who required a dog to protect their game from poachers. Bulldogs were aggressive and intrepid during the time—much more so than today’s bulldog—but the breed was too small to take down a human.

The mastiff was too big and slow for the role, but combining the two breeds produced the ideal guard dog. The brindle color was chosen because it offered natural camouflage. This breed was transported to South Africa to protect the De Beers diamond mines. Though the Bullmastiff is still an excellent guard dog, it is more commonly regarded today as a loving companion and superb family dog.



The Bullmastiff’s dense, short coat protects it from the cold, snow, and rain. It has a brindle, fawn, or red coat with dark ears and snout. A Bullmastiff may have a little white mark on its chest. The shorthaired coat is simple to care for. Brush its coat with a hard bristle brush or rubber brush and metal comb to eliminate stray hair and dander and keep its coat healthy.

Bullmastiffs shed, and brushing on a regular basis will help reduce the amount of fur found around the house. Bathe your Bullmastiff only when necessary, and only with a premium dog shampoo. Male may weigh 110 to 133 pounds, while females weigh 100 to 120 pounds.

  • Weight: 50 to 66 kg
  • Coat length: Short and dense
  • Amount of shedding: Low
  • Color: Fawn and red with dark muzzle and ears
  • Pattern: Solid and brindle


The Bullmastiff is a loving, loyal, and courageous dog who makes an outstanding guard dog. Your dog will adore your family and will guard and protect them. Its natural tendency is not to attack, but to place itself between its master and the intruder, or to knock the intruder to the ground and restrain him.

Though it is concerned about its family, it will become determined and aggressive, even if it would not ordinarily attack or bite. The Bullmastiff is often loyal, peaceful, affectionate, and submissive, with an even temperament. This breed is fearless but may be stubborn at times, so teach and socialize your dog from a young age so it understands appropriate conduct.

Because of the dog’s size, small children must be supervised when they are near it so that they do not inadvertently injure themselves. Many Bullmastiffs get along with other dogs, however some may only tolerate male or female canines.

They are not energetic dogs; in fact, this breed like to relax by lying around the house and doing as little as possible. Make sure to take your dog outside on a regular basis to keep it active. Your dog requires daily exercise to stay in condition. Take your dog on daily walks and let him play in a spacious fenced-in backyard.

  • Lifespan: 8 to 10 years
  • Active: Medium
  • Intelligence: Medium
  • Vocalize: Medium

Health Treatment

Responsible breeders have strived to maintain the highest quality breed standards as set by kennel clubs such as AKC. Dogs bred according to these standards tend to inherit genetic diseases. Among the diseases that need to be considered include:

  • Hip dysplasia: An abnormality in the hip socket, which can cause pain and arthritis
  • Elbow dysplasia: An ocular condition that causes the eyelids to roll inward
  • Gastric dilation-volvulus: Bloat
  • Ectropion: A common condition in which the lower eyelids droop or roll out
  • Hypothyroidism: Thyroid hormone deficiency causes lack of energy, obesity, and infertility
  • Skin problems: Sensitive skin is prone to irritation, sores, and rashes

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