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About Bullmastiffs in Calgary
The Bullmastiff (also written "bull mastiff" or "bull-mastiff") is one of the original gentle giants — a calm, docile breed with a deep loyalty to its family that belies its imposing 100-to-130-pound frame. Bullmastiffs were originally bred in 19th-century England as estate guardians, crossed from Mastiff and Bulldog stock to silently track and pin poachers rather than attack them. That controlled, even-tempered working heritage is exactly why today's bull mastiffs make such reliable family companions: they are happiest lounging beside their people, alert but never reactive.
Mastiff-type dogs appear in Calgary rescues more often than people expect — usually because owners underestimate the space, food, and veterinary costs of a giant breed. A bull mastiff can eat 4 to 8 cups of food daily, and routine vet care costs more because of larger drug doses and extended anesthesia. The good news is their exercise needs are surprisingly modest: two moderate 20-to-30-minute walks per day is usually enough. They are not suited to apartment living due to their size, but they are notably calm and quiet indoors.
When Calgary adopters search for a "bull mastiff dog," they often actually want any of several closely related Mastiff-type breeds, all of which periodically appear in local rescues. Bullmastiffs are the original Bulldog-Mastiff cross — 100-130 lbs, short-faced, the most common variety in Calgary shelters. English Mastiffs are larger still (often 150-220 lbs) and even more docile; they show up less often but are worth waiting for. Cane Corso is an Italian Mastiff with a more athletic build, slightly higher exercise needs, and stronger guarding instincts — best for experienced owners. Mastiff mixes (often part Pit Bull, Boxer, or Great Dane) are the most common variety overall and inherit the gentle Mastiff temperament with somewhat lower food and care costs. All four types use this page; filter by size or check individual listings to confirm specifics.
All bull mastiffs and Mastiff-type dogs listed below are from 15+ Calgary-area rescues and updated regularly. Giant breeds take longer than average to find homes, so if you have the space, the budget for higher food and vet costs, and the commitment to a 7-to-10-year companion, consider giving a gentle giant a second chance.
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Are Bullmastiffs good family dogs?
Bullmastiffs are excellent family dogs when properly socialized. They are gentle, patient, and naturally protective of children. Their calm demeanour makes them reliable companions in busy households. However, due to their size, supervision is important around very young children as they can accidentally knock toddlers over. They are typically good with older children who can interact with them respectfully.
How much exercise does a Bullmastiff need?
Bullmastiffs have surprisingly low exercise needs for their size. Two moderate walks of 20 to 30 minutes each per day is usually sufficient. They enjoy short play sessions but tire quickly. Avoid intense exercise, especially in Calgary's summer heat, as they are prone to overheating. Puppies and young Bullmastiffs should have limited exercise to protect their developing joints.
How much does it cost to own a Bullmastiff?
Bullmastiffs are more expensive to own than average-sized dogs. Food costs run $100 to $200 per month. Veterinary costs are higher due to their size — larger drug doses, more anesthesia, bigger crates, and larger beds. Common health concerns include hip and elbow dysplasia, bloat, and certain cancers. Pet insurance is recommended. Despite the costs, their loyal and loving nature makes them incredibly rewarding companions.
What is the difference between a Bullmastiff and an English Mastiff?
Both are Mastiff-type breeds but have different histories and sizes. The Bullmastiff (also spelled "bull mastiff") is a 100-130 lb dog originally bred from Mastiff-Bulldog crosses in 19th-century England as a gamekeeper's guardian. The English Mastiff is larger (often 150-220 lbs), has an even more docile temperament, and is one of the oldest dog breeds in the world. Both appear in Calgary rescues, though English Mastiffs are rarer. Bullmastiffs are slightly more athletic and protective; English Mastiffs are calmer and more couch-loving. Both make excellent family dogs for owners with adequate space.
Where can I find a Bullmastiff for adoption in Calgary?
Bullmastiffs and Mastiff mixes appear sporadically in Calgary rescues — they are not a high-volume breed locally. The dogs listed on this page are aggregated from 15+ Calgary-area rescues including Calgary Humane Society, AARCS, Pawsitive Match, and others. Listings update regularly. If you don't see one currently available, check back regularly or sign up for our alerts. Bullmastiff Rescue of Canada is also a national resource that occasionally has dogs needing homes in Alberta.