How Long Do Bullmastiffs Live? Lifespan & Health

The Bullmastiff is a powerful, devoted guardian — calm and affectionate at home, yet built like few other breeds. Behind that gentle-giant temperament are some specific health predispositions, and a naturally shorter lifespan, that every Bullmastiff owner should understand. Here's how long Bullmastiffs live, what to watch for, and how to help yours stay healthy.

How long do Bullmastiffs live?

Bullmastiffs typically live to around 8–10 years. It's an honest figure: giant breeds simply don't live as long as smaller dogs, and the Bullmastiff's size puts extra demands on the heart, joints and body. The flip side is that careful breeding, weight management, joint care and prompt attention to the breed's known issues all influence both the length and the quality of those years. A well-bred, well-cared-for Bullmastiff is a devoted family member for the time you have together.

Joints and bloat

Like most large and giant breeds, Bullmastiffs are prone to hip and elbow dysplasia — developmental joint conditions that can cause pain and arthritis. Buying from hip- and elbow-scored parents matters, as does keeping your dog lean, avoiding over-exercise while a puppy is still growing, and providing a supportive bed and sensible, joint-friendly exercise throughout life. As a deep-chested breed, the Bullmastiff is also at real risk of bloat (GDV) — a sudden, life-threatening emergency where the stomach fills with gas and can twist on itself, cutting off the blood supply. Learn the signs (a swollen, hard belly, unproductive retching, restlessness, drooling and distress) and treat it as a 999-for-dogs emergency, because minutes count. Feeding measured meals, using a slow feeder, keeping mealtimes calm and avoiding vigorous exercise right after eating all help reduce the risk.

Heart conditions

Bullmastiffs have a recognised predisposition to heart problems, including subvalvular aortic stenosis (SAS) — a narrowing below the aortic valve that the heart has to work harder against. Good breeders may have breeding dogs heart-screened, and your vet can pick up a heart murmur during routine checks. Signs to watch for include exercise intolerance, unusual tiredness, breathlessness or fainting; any of these warrant a prompt veterinary assessment.

Cancer

As with several large and giant breeds, cancer is an important cause of illness in older Bullmastiffs, with lymphoma among the types noted in the breed. This is one reason it's worth checking your dog over regularly for new lumps, swellings or sudden weight loss, and taking any unexplained changes to your vet without delay. Early investigation gives the best chance of effective treatment.

Eyes and breathing

Bullmastiffs can be affected by eyelid problems such as entropion, where the eyelid rolls inwards and the lashes irritate the eye — this is uncomfortable and often needs veterinary correction. The breed is also moderately brachycephalic: the shortened muzzle can mean snoring, noisy breathing and reduced tolerance of heat. Keep an eye on your dog's breathing, especially in warm weather or during exertion.

What Bullmastiffs are like to live with

Bullmastiffs are calm, steady and deeply loyal — naturally protective without being highly excitable, and famously gentle and affectionate with their own family. They're not banned in the UK and make wonderful companions, but their sheer strength means early socialisation and positive training are essential. They also drool, thanks to their loose lips, so a relaxed attitude to a bit of mess helps.

Helping your Bullmastiff live well

• Keep them lean — easier on the joints and heart, and better for overall health.
• Feed to avoid bloat — measured meals, slow feeding, calm at mealtimes, and no strenuous exercise straight after eating.
• Check for lumps and watch breathing and energy — given the cancer and heart predispositions, early veterinary attention genuinely matters.
• Protect the joints — sensible exercise for the puppy's growing frame, and supportive bedding throughout life.
• See your vet regularly, moving to twice-yearly checks as your dog ages from around six.

When to see your vet

Book a check if you notice a swollen belly or retching (an emergency), any new lump or swelling, exercise intolerance, breathlessness or fainting, unexplained weight loss or tiredness, or eye discomfort. Bullmastiffs are stoical dogs, so taking subtle changes seriously is especially worthwhile in a giant breed prone to heart disease and cancer.

*This is general guidance, not a substitute for advice from your vet, who can assess your individual dog.*

Sources

• RVC VetCompass — UK dog health and longevity research (rvc.ac.uk/vetcompass).
• UK Kennel Club & BVA — breed health and hip/elbow/eye screening schemes (thekennelclub.org.uk).
• PDSA — dog health and breed care (pdsa.org.uk).
• Blue Cross — dog health (bluecross.org.uk).