Guardian breed Large size 54-91 kg
Mastiff
A calm, enormous homebody guardian: modest exercise needs, immodest food bills, and one of the shortest lifespans in dogdom.
Match with your household
See match detail → Quick overview
Large
Size
54-91 kg · 70-77 cm
Low
Exercise needs
Short walks and play sessions
Moderate
Alone-time tolerance
Half a workday, with preparation
Moderate
Training
Needs patience and consistency
Minimal
Coat care
Occasional brushing is enough
Good
Fit with kids
Good family fit with basic rules
Conditional
Other pets
Case by case - introduce carefully
Heavy
Health burden
Joints, bloat, heart
The Mastiff typically weighs 54-91 kg, stands 70-77 cm, and lives 6-10 years.
Consider this breed if…
you want a calm, low-energy giant that mostly lounges indoors,
you have space for a very large dog and can afford big food and vet bills,
you want a gentle family guardian and can train early and firmly,
you accept a short lifespan and are ready for the emotional side of that.
Do not consider this breed if…
you want a long-lived dog; giants like this often reach only 6-10 years,
your budget cannot absorb giant-breed food, meds and surgery costs,
you live in a small space or want an active hiking or running partner,
you cannot manage or physically handle an 80 kg dog if needed.
A typical day with a Mastiff
- 7:00 · MorningGentle walk and a potty break
- 9:00 · MidmorningSprawls out and dozes near the family
- 13:00 · NoonShort, easy walk; avoid heat
- 16:00 · AfternoonCalm play or a training refresher
- 19:00 · EveningRelaxed family time indoors
- 22:00 · NightSnores contentedly, watchful of the home
Family and environment
Kids Good
Gentle with family; supervise as sheer size can knock a child over.
Dogs Conditional
Often fine; introduce carefully, especially same-sex.
Cats Conditional
Can coexist with cats raised alongside it.
Apartment Conditional
Low energy helps, but the size makes it awkward.
House with a yard Ideal
Room to move and lounge suits a giant.
City Conditional
Manageable but needs space and easy access outdoors.
Countryside Ideal
Space and a quiet home to guard suit it well.
Health data provided by RealVetCost Overall health burden Heavy
Detailed health data - inheritance, prevalence, course, and typical treatment costs - lives in a separate expert database. This is general guidance, not veterinary advice - confirm any decision with your vet.
View the full health profileTop health concerns
Hip and elbow dysplasia Screening essential at this size
Bloat (GDV) Deep chest - emergency risk
Heart disease Cardiomyopathy in giant breeds
Similar breeds - by reason
Not visually similar - similar in what they mean for you.
Smaller, more agile mastiff guardian
Bullmastiff
A calm, devoted guardian that is gentle with its family - but the size, drool and short lifespan with heavy joint and heart risks are real commitments.
View profile →
Another gentle giant with similar size and needs
Saint Bernard
A gentle, family-loving giant that is calm indoors - its huge size, drool, joint disease and short lifespan are the heavy trade-offs.
View profile →
Powerful mastiff with a comparably short lifespan
Dogue de Bordeaux
A massive, affectionate French mastiff and devoted family guardian - but heavy health burdens, serious drool, and one of the shortest lifespans in dogdom come with the package.
View profile →Frequently asked questions
How much does a Mastiff cost in the US?
Pups from reputable breeders commonly run $1,000-$2,500, with health-tested lines costing more. The bigger cost is ownership: this is a giant breed with matching food, medication and surgery bills, so over a 6-10 year life food and routine vet care typically add $15,000-$25,000 or more, and a bloat surgery or joint condition alone can add several thousand dollars.
How long do Mastiffs live?
Sadly, not long. Like most giant breeds, Mastiffs often live only about 6-10 years, one of the shortest ranges in dogs. It is an important thing to accept before choosing the breed.
How much exercise does a Mastiff need?
Less than its size suggests. Adults do well on a couple of gentle daily walks and calm play; hard or excessive exercise, especially in heat or while growing, is risky for their joints. They are homebodies, not endurance athletes.
Are Mastiffs good family dogs?
Yes, they are typically calm, affectionate and gentle guardians that bond closely with their family. Their main downsides are the cost, the drool and shedding, the short lifespan and the sheer size, which means young children can be knocked over by accident.