How long do Mastiffs live?

The median lifespan of the Mastiff is 9.0 years, based on the 2024 McMillan et al. study of 584,734 UK dogs.

What health problems do Mastiffs have?

Commonly reported conditions in the Mastiff include Hip dysplasia, Elbow dysplasia, GDV (bloat), Cystinuria, Progressive retinal atrophy.

Is the Mastiff a healthy breed?

On the Breed Health Score the Mastiff scores 37 out of 100 (grade D), compared with an average of 71 across 155 breeds.

37/ 100

Mastiff Grade D

Median lifespani 9.0 yr · giant · 55-100 kg

⇆ Compare Mastiff

The Mastiff is a giant breed with a median lifespan of 9.0 years, which places it among the shortest-lived third of the 155 breeds we rank for longevity. Commonly reported health conditions include Hip dysplasia, Elbow dysplasia, GDV (bloat), Cystinuria. Its overall Breed Health Score is 37/100 (grade D), against an average of 71/100 across all breeds.

Score breakdown

Longevityi 65%

Conformationi 20%

Hereditary burdeni 15%

Higher is healthier. See methodology.

Common & hereditary conditions

Hip dysplasia Elbow dysplasia GDV (bloat)Cystinuria Progressive retinal atrophy

Red marks a life-threatening or major-welfare condition. Click a condition to see which breeds it affects. This list reflects commonly reported conditions, so better-studied breeds may show more; hereditary burden is the lightest-weighted part of the score. Source: RVC VetCompass / AKC / PDSA (indicative).

Thinking of a Mastiff? A breed's health profile affects insurance cost. Comparing pet insurance early, before any conditions become pre-existing, usually gets the best cover.

Compare with similar-size breeds

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Data & citation. Median lifespan: McMillan, K.M. et al. (2024) "Longevity of companion dog breeds", Scientific Reports (584,734 UK dogs). Data CC-BY 4.0. Source. Machine-readable: developer API. These are independent estimates for comparing breeds, not veterinary advice. Photo: Pixabay via Pexels.