Working Dogs
Mastiff
Reviewed by the Hushku editorial team · Updated 2026-05-19
Size
Very Large
Life Span
6 to 10 years
Weight
130 to 220 pounds
Height
27 to 32 inches tall at the shoulder
Breed Group
Working Dogs
Adaptability
Friendliness
Trainability
Energy
Health
Intelligence
About the Mastiff
The Mastiff is a very large working dogs known for its outgoing nature and straightforward mind. Better suited to homes with space, the Mastiff is best matched with experienced owners. Typically standing 27 to 32 inches tall at the shoulder and weighing 130 to 220 pounds, this breed has a life expectancy of 6 to 10 years, making it a devoted companion for the right family.
Originally classified within the Working Dogs group, the Mastiff brings a distinct combination of traits that sets it apart. The Mastiff has a moderate energy level that suits an active household without being overwhelming. Deeply affectionate, the Mastiff loves being close to its people and forms strong bonds with every member of the household.
Temperament
The Mastiff has a famously warm and sociable temperament that makes it responsive to its environment without being overly sensitive. The Mastiff is famously gentle and patient with children of all ages, making it a wonderful family dog. With other dogs the Mastiff can be selective, and careful introductions are recommended.
Around strangers, the Mastiff is naturally reserved and can make an effective watchdog. This breed tends to be quiet and won't alert you to every passing noise. This breed has a low wanderlust potential and is unlikely to roam. Prey drive is low, making off-lead exercise relatively safe in open areas.
Health & Lifespan
With a life expectancy of 6 to 10 years, the Mastiff is a medium-lived breed. Overall a hardy breed, the Mastiff benefits from routine vet check-ups and preventive care.
Common health areas to discuss with your vet for working dogs breeds like the Mastiff include joint health, dental hygiene, and routine parasite prevention. The Mastiff can be prone to weight gain. Measure meals carefully, limit treats, and ensure adequate daily exercise to keep them at a healthy weight. Pet insurance is strongly recommended from puppyhood — it provides peace of mind and helps manage unexpected veterinary costs throughout your Mastiff's life.
Is this breed right for you?
The Mastiff is best suited to experienced dog owners who can provide an active lifestyle with plenty of outdoor time. A home with outdoor space is strongly preferred.
Like most dogs, the Mastiff is happiest when not left alone for extended periods. This breed prefers warmer climates and should be protected from extreme cold. Hot weather should be approached with caution — ensure shade, water, and avoid exercise in peak heat.
In summary, the Mastiff is a sociable and loving working dogs that rewards patient, experienced owners. Do thorough research, meet the breed in person if possible, and connect with a reputable breeder or rescue before bringing a Mastiff home.
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