Breed Summary

Bullmastiff is a large dog that belongs to the group of Working Dogs. They have a large head with a solid build and short muzzle and wrinkled skin on the face, deep chest, massive body, and long tail. They are a symmetrical dog, showing exceptional strength, endurance, and alertness. The foundation breeding was 60 percent Mastiff and 40 percent Bulldog. This breed was developed in England for protection against poachers by gamekeepers.

Country of Origin: United Kingdom

AKC Breed Popularity: Ranks 51 of 196

AKC Classification: Working group

UKC Classification: Guardian Dog

Exercise Requirements: 40 minutes/day

Height: Female: 24-26 in.; Male: 25-27 in.

Weight: Female: 100-120 lbs.; Male: 110-130 lbs.

Physical traits: Large, Symmetrical, Heavy

Coat: Length: Short

Characteristics: Flat

Colors: Red, fawn, brindle

Overall Grooming Needs: Moderate

Personality traits/Temperament: Affectionate, Loyal, Brave

Energy Level: low to moderate

Tendency to Drool: High

Tendency to Snore: High

Tendency to Bark: Low

Tendency to Dig: Low

Social/Attention Needs: Moderate


Bullmastiffs are a healthy large breed with heavy bones. Their life expectancy is 7 to 9 years. They should be screened for cardiac issues, hip and elbow dysplasia, hypothyroidism, and eye problems. Like many dogs, Bullmastiffs can develop cancer and bloat, sudden and life-threatening swelling of the abdomen. The owners should educate themselves about their symptoms and what to do should bloat occur. Some dogs can develop itchy skin conditions where baths with a high-quality dog shampoo and conditioner is recommended. Flea control is also essential.


Bullmastiff breeders advise giving large-breed puppy food for puppies to ensure slow and steady growth. Don’t give too much food at each meal to them. Several small meals are best for puppies, and two meals daily is a good routine for adults. Exercise is discouraged immediately before and after eating to avoid bloat. The puppies should be kept lean, as they grow rapidly, which can tax their systems. Add a high-quality dog multivitamin to complete the nutritional circle.


Bullmastiff is a courageous, confident, independent, and stubborn dog. They require early training and socialization during the early age. Both the dogs and owners will both enjoy training regimens instilled in puppyhood. It responds well to the positive reinforcement methods and powerful leadership skills of the owner. They can excel in agility, obedience, rally, even scent work, and tracking, so training should begin immediately and be a part of the lifelong bond between dog and owner.


Bullmastiffs enjoy regular exercise. They are very active by nature, but moderate exercise should be encouraged. They can be perfectly content with just a few quick walks each day and dislike hot weather. Use paw balm daily to protect their feet. Fencing is critical to ensure that the dog is safely contained and so strangers and unfamiliar animals do not intrude on the Bullmastiff’s territory. Over exercise should be avoided in a puppy. They are not the ideal breed for people who want a canine running partner, but they are great walking companions.

Fun Fact

The Bullmastiff is different from a traditional guard dog. They were trained not to bark or bite intruders.


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