Mastiff
Great Britain, Molossian type
- Size
- Giant
- Height
- 70–80 cm
- Weight
- 60–90 kg
- Life expectancy
- 7–10 yrs
- Calm
- Loyal
- Dignified
- Protective
Heights and weights are typical adult ranges; individual dogs vary.
About the Mastiff
The Mastiff is a very large, powerful dog from Great Britain, with a long history as a guardian of property and people. It has a massive frame, a broad head with a short muzzle, a dark mask and a short coat in fawn, apricot or brindle. Despite its size it is generally a calm, dignified dog rather than an energetic one.
Temperament
Typically gentle, loyal and steady with its family, the Mastiff is a natural watchdog that is reserved with strangers. It can be sensitive to harsh handling. Early socialisation and calm training matter because of its sheer size.
Exercise
Moderate exercise suits it, such as two or three steady walks daily. Avoid hard running while young and in hot weather. It likes to spend much of the day resting.
Grooming
The Mastiff's short, close coat is quick to look after with a weekly going-over. Wipe the wrinkles on the muzzle and clean the drooping lips after meals and drinking. Expect strings of slobber around the house.
Care & wellbeing
Giant dogs need care for their joints, so keep them lean and avoid over-exercising puppies. Watch for heat tolerance. Lifespan is shorter than for smaller dogs.
Daily needs at a glance
For a typical 75 kg adult- Water
- 3 L–4.5 L
- a day
- Energy
- ≈ 2,850 kcal
- a day, neutered adult
- Exercise
- 30–60 min
- a day
- Grooming
- A brush once a week
Starting points from the same formulas as our calculators. Your pet's age, weight, activity and food all change the numbers. Work it out for your pet
Living with a Mastiff
Typical tendencies for the breed. Upbringing, training and the individual matter as much.
History
A giant guardian breed from Britain with a history stretching back many centuries as a property protector and a participant in old-style hunting and guarding work. Numbers dwindled in the 20th century and were rebuilt by dedicated breeders. Today it is a calm, dignified household companion.
Health
The breed can be prone to
- Hip and elbow dysplasia
- Bloat (gastric dilatation-volvulus)
- Eye conditions
- Heart disease
Health tests to ask a breeder about
- Hip and elbow scores
- Eye tests
- Heart screening
Not every Mastiff is affected, and this isn't a diagnosis. Read about common conditions and when to see a vet.
Cost to keep
Highest than average- Food, insurance and medicines cost more for a big dog
- Little or no professional grooming needed
- A 7–10 year commitment
- Budget for breed-related health checks or insurance
A relative guide, not a price — costs vary a lot by country, insurer and lifestyle.
Is a Mastiff right for you?
Could suit
- Calmer households and owners who prefer gentle walks
- People who'd rather not spend much time grooming
Think twice if
- Space, food and vet costs are a concern — giant breeds need more of all three
Not sure? Try the breed finder or read choosing the right dog breed.
Common questions
How big does a Mastiff get?
Adult Mastiffs typically stand about 70–80 cm at the shoulder and weigh around 60–90 kg. Individuals vary, and males are often larger than females.
How long do Mastiffs live?
Typically 7–10 years. Keeping them lean, active and up to date with vet checks gives the best chance of a long, healthy life.
How much exercise does a Mastiff need?
As a guide, around 30–60 minutes a day, split between walks, play and sniffing time. Puppies and older dogs need shorter, gentler sessions.
How much grooming does a Mastiff need?
A brush once a week. Check ears, teeth and nails as part of the routine.
Are Mastiffs easy to train?
Generally trainable with consistent, reward-based practice.
Do Mastiffs shed?
A moderate amount. Regular brushing keeps loose hair under control.
Are Mastiffs good with children?
Many get on well with children. Always supervise young children with any dog, and teach them to give the dog space.
Can a Mastiff live in a flat?
It's usually a challenge — as long as they get enough daily exercise and time outdoors.
What health problems do Mastiffs have?
The breed can be prone to hip and elbow dysplasia, bloat (gastric dilatation-volvulus), eye conditions. Not every Mastiff is affected — ask a breeder about health testing, and your vet about what to watch for.
Written by Petopedia as general guidance, not veterinary advice. Ask your vet about health screening for this breed.
Breed details
- Country of origin
- Great Britain
- Type
- Molossian type
- Internationally recognised
- 1964