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There is something irresistible about a pup that is so enormous and, yet, so adorable. As appealing as they are, taking on a dog this large is a huge responsibility (pun intended). They are generally calm and are often very good with children, but they can be resistant to training. These big lugs belong in the hands of experienced parents who can devote the time necessary to bring out the best in them.

Male: 110-130 lbs. 
Female: 100-120 lbs.
Exercise Requirements:
Bullmastiffs are naturally big and strong and can react quickly, but they are quite sedentary. One daily walk (about 30-60 minutes) is enough to ensure they stay healthy and fit.
Mess Factor:
Shedding may not be as much of an issue as slobber. It’s a good idea to keep a few towels on hand for, erm, touch-ups.
Barking and Volume:
Bullmastiffs are not at all yappy and will rarely bark without good reason.
Training Requirements:
Bullmastiffs are not only enormous, but they can also be stubborn in regard to training. It is essential that they receive professional training from a very early age, with an emphasis on socializing them with strangers, children and other dogs. Bullmastiffs can be dangerous in inexperienced hands.
Ongoing Costs:
Health Factors: Bullmastiffs are susceptible to hip, elbow and eye problems, so selecting a reputable breeder is essential, as is monitoring your dog’s health and weight.
Grooming: Home grooming is adequate.
Training: Extensive professional training is strongly advised.
Grooming Requirements:
Bullmastiffs need very little in the way of regular grooming. Trim their toenails and give them a bath if they’ve been investigating something smelly and you’re all set.
Kid Compatibility:
Bullmastiffs are good with children when properly socialized. They are not particularly playful, but they are very protective. Supervision is recommended.
10-12 years.
Friendliness Towards Animals:
Bullmastiffs are quite assertive and can be aggressive toward other dogs if not properly socialized. They should get along well with other pets provided they are introduced carefully and at a young age.
Friendliness Towards People:
Bullmastiffs were bred to be guard dogs and are naturally suspicious of newcomers, but should respond well to strangers that are welcomed by their parents. This is another area where proper training and socialization is essential, as an unmanageable Bullmastiff can be a danger to new people.
A dog that will become a part of your life and family and sadly, most do not reach a double-digit lifespan. However, you’ll sleep soundly knowing that your Bullmastiff is keeping watch over the household.

Links and resources:
The American Bullmastiff Association
The Bullmastiff Fanciers of Canada
Bullmastiff Rescue of Canada
The American Bullmastiff Association Rescue Program
Bullmastiff Rescue Resource Centre
Bullmastiff plays with sprinkler

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