Bullmastiff Puppy And Dog Information

The Bullmastiff is a large, powerful dog that excels at watch dog and guard dog duties. Just seeing one of these dogs should put anyone up to no good on notice. They can live in an apartment because they can be fairly lazy and laid back. They train easily, need to be socialized with other pets and do well with older children. We have many more Pets Care Articles Now Available.

Good With Children?

Will generally tolerate children. May tend to knock toddlers over as a clumsy puppy. As a reminder, never leave young children unsupervised with a puppy or dog.

Good With Other Pets?

They need to be socialized with other pets early on.


Docile yet fearless. She is a dependable family protector.


She is sensitive to voice tones, intelligent, and does well in training.

Approximate Adult Size

The approximate adult size (two years old or older) of the male bullmastiff is 25 to 27 inches to the withers (highest point of the shoulder) and 110 to 130 pounds. The female ranges from 24 to 26 inches to the withers and 100 to 120 pounds.

Special Health Considerations

Most dog breeds have certain inherited health problems associated with that specific breed and the Bullmastiff is no exception. Be on the look out for canine hip dysplasia (genetic based looseness in the hip joint that can lead to arthritis pain and lameness), gastric torsion, bloat (Gastric Dilation-Volvulus, the second leading killer of dogs, can kill within the hour, this space is too limited for a complete explanation but you should read up on this). Feeding more then once a day and avoiding exercise right after meals may help guard against bloat. Also look out for cancer, eyelid problems and possibly hypothyroidism (sluggish thyroid gland which can result in weight gain).This disease list is an informative guideline only. Other diseases may also be significant threats, please contact your veterinarian for a complete list.

She should visit the veterinarian several times in the first year for shots, boosters and check up. Then, as an adult, she should visit the veterinarian yearly for shots and check up. As she gets older, six years and on, she should visit the veterinarian twice a year for check ups and shots. Remember; avoid feeding your dog sweets.


The Bullmastiff has a short, dense, somewhat coarse coat, great for weather protection. She sheds little but should be brushed regularly to help her maintain a clean and healthy coat and help you keep a closer eye on her health and strengthen your emotional bond with her.

Her teeth should be brushed at least twice a week with toothpaste and toothbrush designed for dogs. Brushing removes the accumulation of plaque and tartar which can cause cavities (rarely) and periodontal disease. Dog periodontal disease can lead to pain, loss of teeth, bad breath and other serious disease.

Her toenails may need to be examined for growth and clipped regularly. The toenails of the rear feet grow slower than the toenails of the front feet. Generally a guillotine type trimmer is the best for this chore and competent instructions to accomplish this can be found on the net.

Life Span

She was developed in England to guard against poachers The Bullmastiff can live between 6 and 10 years with proper nutrition, medical care and excellent living conditions.


The Bullmastiff is a cross between a Mastiff and Bulldog. They were developed in England around 1924 to help guard against poachers. They were trained to find and hold poachers, not kill them. They were first registered by the American Kennel Association in 1934.

Some Registries

  • American Bullmastiff Association.
  • UKC United Kennel Club
  • NKC National Kennel Club
  • CKC Continental Kennel Club
  • APRI Americas Pet Registry Inc.
  • AKC American Kennel Club
  • FCI Federation Cynologique Internationale
  • NZKC New Zealand Kennel Club
  • KCGB Kennel Club of Great Britain
  • ANKC Australian National Kennel Club
  • ACR American Canine Registry

Litter Size

5 to 8 Bullmastiff puppies



Terms To Describe

Loving, fearless, intelligent, loyal, great strength, endurance, alert, active, powerful, sweet, lovable, good natured, agile, aggressive


  • Very good watch dog.
  • Good obedience.
  • Fast learner.
  • Highly intelligent.
  • Even tempered.


  • Very good guard dog.
  • An experienced owner is preferred to deter dominance issues.
  • She can be willful.
  • She can be lazy and may be prone to weight problems.
  • She tends to slobber.
  • She should be socialized with people and animals at a young age.
  • Will not back down.
  • Tends to snore.

Other Names Known By

Gamekeepers Nightdog.

Every dog is an individual so not everything in this information may be correct for your dog. This information is meant as a good faith guideline only. We have many more Pets Care Articles Now Available.