Working group
Mastiff
The gentle heavyweight — dignified, loving and among the largest dogs on earth.
Mastiffs (often called English Mastiffs) are enormous, calm guardians with a gentle, affectionate nature. They are low-energy and devoted, but their size, drool and short lifespan bring real costs.
- Height
- 27.5–36 in70–91 cm
- Weight
- 120–230 lb54–104 kg
- Life expectancy
- 6–10 years
- Size
- Giant
- Group
- Working
- Origin
- England
Coat: Short, dense, straight coat. Colours: Fawn, Apricot, Brindle, With a dark mask.
At a glance
Ratings describe typical dogs of the breed on a 1–5 scale. Individual dogs vary with lines, upbringing and training.
Temperament
Mastiffs are dignified, good-natured and loving with their families. They are usually calm indoors and patient with children. They tend to guard by presence rather than aggression.
They are wary of strangers and can be stubborn. Puppies grow extremely fast and must learn manners early, because an adult Mastiff that pulls or jumps is nearly impossible to control physically.
Living with a Mastiff
Exercise
Low to moderate: two short-to-moderate walks daily. Avoid heat and strenuous exercise, especially while growing.
Grooming
Minimal coat care, but wipe drool and facial folds daily and keep nails short. Moderate shedding.
Training
Willing but stubborn; short, positive sessions and early lead training are essential for a dog this size.
Kids & other pets
Gentle with their own children, though size alone can knock toddlers over. Usually fine with other dogs if socialised.
Time alone
Tolerates moderate alone time and is calm indoors, but needs a large, comfortable resting space.
Home fit
Best suited to a house with secure outdoor space; apartment living is hard on this breed and its neighbours.
Is a Mastiff right for you?
Take the Breed Fit quiz to see how a Mastiff matches your home, schedule and tolerance for shedding, barking and exercise — or find out which breed matches your personality with Dogsona.
Health
With good breeding and care, a Mastiff typically lives 6–10 years. These are the conditions most associated with the breed — not a prediction for any individual dog.
Hip and elbow dysplasia
Common in giant breeds; screened parents and slow growth help.
Gastric dilatation-volvulus (bloat)
A deep-chested giant breed at high risk.
Cystinuria
An inherited disorder causing bladder stones, mainly in males; testing is available.
Progressive retinal atrophy
A dominant inherited form occurs; a DNA test is available.
Cancer
Osteosarcoma and other cancers contribute to a short lifespan.
Ask a breeder for
- Hip and elbow evaluation
- Cardiac examination
- Eye examination
- DNA test for dominant PRA
- Cystinuria testing
Sources: OFA CHIC breed requirements: Mastiff; Mastiff Club of America. This is general information, not veterinary advice — talk to your vet about your own dog.
Cost to own
After the first year, expect roughly $2,000–$4,000 a year for food, routine vet care, preventives, insurance and supplies (US estimate).
- Food, medication and anaesthesia are dosed by weight, so every vet visit costs more for a big dog.
- Pet insurance for a puppy typically runs $30–$60 a month; premiums rise with age and breed risk.
History
Large mastiff-type dogs guarded English estates for centuries and were described by Julius Caesar during the Roman invasion of Britain. They were used for guarding, hunting and, sadly, blood sports.
The breed nearly disappeared after WWII, when only a handful remained in Britain; imports from North America helped rebuild it. The AKC recognised the Mastiff in 1885.
Did you know?
- A Mastiff named Zorba was recorded as weighing 343 lb in 1989, the heaviest dog on record.
- Julius Caesar described British mastiffs fighting alongside their owners.
- A Mastiff reportedly came to America on the Mayflower.
Library guides for Mastiff owners
Training
Heel and Loose-Leash Walking
A strong Mastiff needs loose-lead manners early.
Grooming
Ear Cleaning
Ear care matters for this coat and ear type.
Exercise & Play
Dog Walking
Getting daily walks right for a Mastiff.
Grooming
Nail Clipping
Every dog needs regular nail care.
New Dog Owners
How to find a reputable dog breeder
What to ask a Mastiff breeder about health screening.
New Dog Owners
The real cost of a puppy: what to budget before you bring one home
Budget for the first year and beyond.
Similar breeds
Frequently asked questions
- Are Mastiffs good family dogs?
- Yes — they are gentle and loving, but their size and drool need planning.
- How much do Mastiffs eat?
- Adults may eat 6–8 cups of food a day; feed a giant-breed puppy food to control growth.
- How long do Mastiffs live?
- Typically 6–10 years.