ForTheBreed
A Mastiff — giant breed, moderate shedding

Mastiff

Ancient, massive, and surprisingly gentle. The Mastiff barely moves but its sheer presence is enough to deter anyone.

Giant breedlow energyGood with kids
Moderate sheddingQuietModerate trainingGood with kidsChases cats
Weight
54–100kg
Lifespan
6–10 years
Exercise
30–45 min/day
Shedding
Moderate shedding
Barking
Quiet
Training
Moderate
ForTheBreed Editorial
Published · Updated

Our breed guides are researched using Kennel Club data, BVA health scheme reports, and peer-reviewed veterinary sources. No sponsorships or affiliate relationships influence our assessments.

Do Mastiffs shed?

Moderate shedding

Mastiffs shed a moderate amount — noticeable but manageable with regular brushing. Expect heavier shedding in spring and autumn as they blow their coat. A weekly brush reduces the hair in your home significantly. Not the breed for anyone with severe allergies, but most people manage fine.

Are Mastiffs good with kids?

Good with kids

Yes — Mastiffs are generally good with children. They tend to be loyal and protective, which makes them a natural fit for busy family life. Always supervise any dog around young children, regardless of breed. Their size means they can accidentally knock small children over, so supervision around toddlers is important.

Are Mastiffs good with cats?

Strong prey drive

Mastiffs have a strong prey drive and will often chase cats. Given their size, this can be dangerous for a cat. It\'s not impossible to have a Mastiff and a cat together, but it takes careful management — separate spaces, slow introductions over weeks, and never leaving them unsupervised until you're absolutely certain they're safe together. Some Mastiffs raised with cats from puppyhood learn to coexist, but the prey drive is rarely fully extinguished.

Are Mastiffs easy to train?

Moderate training

Mastiffs are moderately trainable — capable dogs, but they have opinions and will test boundaries. Positive reinforcement works well. Avoid harsh corrections, which can make them shut down or become anxious. Consistency is the key word with this breed. Everyone in the household needs to use the same rules and commands, or they'll find the inconsistency and exploit it.

Do Mastiffs bark a lot?

Quiet breed

Mastiffs are a quiet breed — they rarely bark without a good reason. This makes them an excellent choice for flat or terraced-house living where noise is a concern. They might bark to alert you to someone at the door, but sustained, excessive barking is uncommon. Neighbours tend to be fans.

Are Mastiffs hypoallergenic?

Not hypoallergenic

No — Mastiffs are not hypoallergenic. They shed medium amounts of hair and dander, which is the main allergen trigger for most people. If allergies are a dealbreaker, consider a Poodle, Bichon Frise, or a Poodle-cross (Cockapoo, Cavapoo, Labradoodle) instead — all produce much less dander.

How much exercise does a Mastiff need?

Mastiffs need 30–45 min/day of exercise daily. They're a relatively low-maintenance breed in this respect — shorter walks suit them fine, and they're perfectly happy with a relaxed routine. Good for owners who can't commit to marathon exercise sessions daily.

Mental exercise matters as much as physical. A Mastiff with a bored brain will find its own entertainment — usually involving your sofa or your shoes. Training sessions, puzzle feeders, and nose-work games all count.

Mastiff health problems

Like all breeds, Mastiffs are prone to certain conditions. Knowing about them upfront means earlier detection, better outcomes, and fewer surprise vet bills.

As a giant breed, Mastiffs are particularly susceptible to bloat (GDV) — a life-threatening condition where the stomach twists. Learn the signs: unproductive retching, distended abdomen, restlessness. It requires emergency surgery. Feeding two smaller meals rather than one large one helps reduce risk.

  • Hip dysplasia. Common in larger breeds, causes arthritis and mobility issues. Check parents have been hip-scored.
  • Elbow dysplasia. Similar to hip dysplasia, affects the front legs.
  • Obesity. The most preventable health problem across all dog breeds. Keep them at a healthy weight.
  • Annual vet checks. Catching problems early makes all the difference.

How long do Mastiffs live?

Mastiffs typically live 6–10 years. Unfortunately, giant breeds have significantly shorter lifespans than smaller dogs — the toll of maintaining such a large body accelerates ageing.

Lifespan is heavily influenced by weight management, exercise, genetics, and access to regular vet care. A Mastiff at a healthy weight, with good genetics and regular check-ups, will typically live toward the top of that range.

How much does a Mastiff cost in the UK?

A Mastiff puppy from a reputable KC-registered UK breeder typically costs £1 000–£2 500.

If you see a Mastiff puppy advertised for significantly less than £1 000, be very cautious. Low prices are the most common red flag for puppy farms.

The purchase price is just the start. First-year costs typically include:

  • Vaccinations: ~£80–120
  • Neutering/spaying: £200–400 depending on size and vet
  • Microchipping (mandatory in UK): ~£20–30
  • Bed, crate, leads, collar: £100–250
  • Food (per year): £400–£1,200+ depending on size and diet
  • Pet insurance: £70–£150/month (see below)
  • Routine vet visits: £50–200/year

Total first-year cost beyond the puppy price: typically £1,500–£3,000.

Mastiff pet insurance

Pet insurance for a Mastiff in the UK typically costs £70–£150/month for comprehensive lifetime cover.

Lifetime cover is strongly recommended over cheaper time-limited or maximum-benefit policies. Once a condition is diagnosed and treated, lifetime cover continues to pay for it every year. Time-limited policies exclude it after 12 months — exactly when chronic conditions become expensive.

Compare quotes from Petplan, ManyPets, Waggel, and Animal Friends — all have strong reputations for actually paying out claims. Always check the annual limit (aim for £7,000+ per condition) and whether hereditary conditions are covered.

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