English Mastiff: Gentle Giant or Giant Mistake?

The English Mastiff is the kind of dog that stops traffic. At 70–100+ kilograms and standing over 70 cm at the shoulder, this is one of the largest dog breeds on the planet. The heaviest Mastiff ever recorded — a dog named Zorba — tipped the scales at 155 kilograms. That’s heavier than most adult humans.

But size is only part of the story. Behind that massive frame is one of the most gentle, loyal and surprisingly lazy dogs you’ll ever meet. English Mastiffs were originally bred as war dogs and estate guardians, but today they’re far more likely to be found hogging the couch than patrolling a castle wall.

In Australia, the English Mastiff has a dedicated following. There are registered breeders across NSW, Victoria, Queensland and South Australia, and the breed competes regularly at Royal shows. But owning one is a serious commitment — financially, physically and emotionally. Their food bills are enormous, their vet bills can be eye-watering, and their average lifespan is heartbreakingly short.

This guide gives you the honest picture: what it actually costs to own an English Mastiff in Australia, the health conditions you need to know about, and whether this gentle giant is the right fit for your life. No fluff, no filler — just the facts.

What You’ll Learn

• Breed traits & temperament
• Health concerns to know
• True cost in Australia
• Training & exercise needs
• Is this breed right for you?

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Quick Facts: English Mastiff at a Glance

Trait	Detail
Breed Group	Working / Utility (ANKC Group 6)
Height	70–76 cm (males); 66–70 cm (females)
Weight	73–100+ kg (males); 54–77 kg (females)
Lifespan	6–10 years (average 8)
Coat	Short, dense, close-lying
Colours	Fawn, apricot, brindle — always with a black mask
Temperament	Gentle, loyal, protective, calm
Exercise Needs	Moderate — about 1 hour daily
Shedding	Moderate year-round; heavier in spring/autumn
Drooling Level	Very high — keep towels handy
Barking Level	Low — deep bark but infrequent
Good With Kids	Yes — excellent with older children; caution with toddlers due to size
Good With Other Dogs	Generally good with proper socialisation
Apartment Friendly	No — needs space despite low energy
Average Puppy Price (AUD)	$800–$3,000+ from a registered breeder

History & Origins

The English Mastiff is one of the oldest dog breeds in existence. Mastiff-type dogs appear in artwork and records from ancient Babylon dating back to around 3000 BCE. When the Romans invaded Britain in 55 BCE, they found large, powerful dogs already being used by the Celts as war dogs and guardians — these were the ancestors of the modern English Mastiff.

The Romans were so impressed that they shipped these dogs back to Rome to fight in the arenas against lions, bears, gladiators and other dogs. It wasn’t a gentle start to the breed’s recorded history. Over subsequent centuries, Mastiffs were used for bearbaiting, bullbaiting and as estate guardians for English nobility.

The breed’s name likely derives from the Latin word “mansuetus,” meaning tame or domesticated — which evolved through Old French and Middle English into “mastiff.” Geoffrey Chaucer referenced the breed’s impressive size in The Canterbury Tales in the 14th century, and a Mastiff reportedly sailed to America aboard the Mayflower in 1620.

The English Mastiff nearly went extinct after World War II, when food rationing in Britain made feeding such enormous dogs impossible. The breed was rebuilt largely from American and Canadian stock, and today the Mastiff Club of America (founded in 1929) and breeders worldwide have restored healthy population numbers.

In Australia, English Mastiffs are registered with the ANKC under the Utility Group (Group 6). There are established breeders in NSW, Victoria, Queensland and South Australia, many of whom health-test their breeding stock and have imported lines from the UK and USA to maintain genetic diversity.

Temperament & Personality

The English Mastiff temperament is almost the opposite of what their intimidating size suggests. These dogs are calm, affectionate and deeply attached to their families. They’d rather lean against your legs on the couch than do just about anything else.

They’re often described as “gentle giants” and the label genuinely fits. Mastiffs are patient with children, tolerant of other household pets (including cats, if raised together), and generally peaceful dogs. They don’t pick fights. They don’t bark excessively. They just want to be near you.

That said, their guarding instinct is real. English Mastiffs are naturally suspicious of strangers and will position themselves between their family and an unfamiliar person. They rarely need to do more than stand there — a 90 kg dog with a deep bark is its own deterrent. They’re not aggressive, but they are protective.

The honest truth about the English Mastiff temperament: they are extraordinarily lazy once past puppyhood. An adult Mastiff’s idea of a perfect day is a brief walk followed by eight hours of sleeping. They can be stubborn in training — not because they don’t understand, but because they can’t be bothered. Patience and food rewards are your best tools.

One thing owners consistently mention: Mastiffs hate conflict within the household. Raised voices and arguments can genuinely distress them. They’re emotionally sensitive dogs who read the room better than most humans do.

And then there’s the drool. English Mastiffs drool constantly — after drinking, after eating, when they’re excited, when they’re hot, and sometimes for no reason at all. If you’re squeamish about slobber, this breed is not for you. Experienced owners keep towels in every room.

Health & Genetic Conditions

This is where the English Mastiff conversation gets serious. Giant breeds carry giant health risks, and the Mastiff is no exception. Their sheer size puts enormous stress on joints, organs and the cardiovascular system. Being informed before you buy is not optional — it’s essential.

Condition	Risk Level	Estimated Treatment Cost (AUD)	Notes
Hip Dysplasia	High	$4,000–$10,000 (surgery)	Extremely common in giant breeds. Always request hip scores from breeders. Managing weight is critical.
Elbow Dysplasia	High	$3,000–$8,000 (surgery per elbow)	Often appears alongside hip dysplasia. X-ray screening is essential.
Gastric Dilatation-Volvulus (Bloat/GDV)	High	$5,000–$12,000 (emergency surgery)	Life-threatening. Very common in deep-chested giants. Preventative gastropexy is worth discussing with your vet.
Osteosarcoma (Bone Cancer)	Moderate–High	$5,000–$15,000+ (treatment)	English Mastiffs have an elevated risk. Symptoms include sudden lameness and swelling. Prognosis is often poor.
Cardiomyopathy	Moderate	$2,000–$8,000+ (ongoing)	Heart disease is a concern in giant breeds. Annual cardiac screening is recommended.
Entropion/Ectropion (Eye Conditions)	Moderate	$1,500–$4,000 (surgery per eye)	Eyelid rolling inward or outward. Can cause irritation, infection and vision impairment.
Cystinuria	Low–Moderate	$3,000–$7,000 (surgery if stones form)	A genetic condition causing bladder stones. DNA testing is available.
Hypothyroidism	Low–Moderate	$500–$1,500/year (medication)	Manageable with daily medication but requires lifelong treatment.
Cruciate Ligament Rupture	Moderate	$4,000–$8,000 (surgery per knee)	Common in heavy dogs. Weight management is the best prevention.
Progressive Retinal Atrophy (PRA)	Low	Limited treatment options	DNA test available. Ask breeders for PRA screening results.

The single most important step you can take is buying from a breeder who hip and elbow scores all breeding dogs, screens for eye and thyroid conditions, and can provide documentation. In Australia, reputable breeders on DogzOnline list their health-testing protocols. If a breeder won’t share health results, walk away.

Pet insurance is not optional for this breed — it’s a necessity. Comprehensive cover for a giant breed in Australia runs $120–$200/month, but a single bloat emergency or cruciate surgery can easily exceed $10,000. Some insurers have breed-specific exclusions for Mastiffs, so read your PDS carefully before signing up.

Preventative gastropexy — a surgical procedure that tacks the stomach to the abdominal wall to prevent torsion — is increasingly recommended for giant, deep-chested breeds. It can be done at the time of desexing for around $500–$1,500 and may save your dog’s life.

Lifespan & Longevity

This is the hardest part of owning an English Mastiff. The average English Mastiff lifespan is 6–10 years, with most falling around 8 years. A UK study put the breed’s life expectancy at approximately 9 years. For a dog you’ll love deeply, that’s not a long time.

The short lifespan is directly related to their size. Giant breeds age faster at the cellular level, and the strain on their hearts, joints and organs accumulates quickly. This isn’t something you can fully prevent, but you can influence it.

Life Stage	Age Range	Key Considerations
Puppy	0–18 months	Slow, controlled growth is critical. Avoid excessive exercise on growing joints. Use large-breed puppy food to control growth rate.
Adolescent	18 months–3 years	Still maturing physically. Avoid high-impact exercise. Continue joint-conscious feeding.
Adult	3–6 years	Prime years but short. Maintain healthy weight. Annual cardiac and joint checks.
Senior	6–8 years	Slowing down. Six-monthly vet visits. Monitor for cancer symptoms, joint pain and heart issues.
Geriatric	8+ years	Every day is a gift. Comfort care, pain management and quality-of-life assessments become the focus.

The number one thing you can do to extend your English Mastiff’s life is keep them lean. Obesity accelerates every health problem this breed is prone to — joint disease, heart strain, bloat risk and cancer. A lean Mastiff is a longer-lived Mastiff. If you can’t feel their ribs under a thin layer of fat, they’re too heavy.

Feeding two to three smaller meals per day instead of one large meal reduces bloat risk. Restricting vigorous exercise for an hour before and after meals is also recommended by veterinary specialists.

Grooming & Care

English Mastiff grooming is straightforward — it’s the drool management that takes effort. Their short, dense coat is low-maintenance, but everything else about caring for this breed is scaled up to match their size.

Grooming Task	Frequency	Product/Tool	Estimated Cost (AUD)
Brushing	2–3 times per week	Rubber curry brush or bristle brush	$15–$35
Bathing	Every 4–6 weeks	Large-breed dog shampoo (you’ll use a lot)	$20–$40 per bath
Wrinkle/Face Cleaning	Daily	Unscented baby wipes or medicated wipes	$10–$20/pack
Ear Cleaning	Weekly	Veterinary ear cleaner	$20–$35
Nail Trimming	Every 2–3 weeks	Heavy-duty nail grinder	$30–$60
Teeth Brushing	2–3 times per week	Enzymatic dog toothpaste	$10–$20
Professional Dental Clean	Annually	Veterinary clinic	$400–$1,000+ (anaesthesia costs more for giant breeds)
Drool Management	Constant	Microfibre towels, drool bibs	$20–$50

The facial wrinkles require daily attention. Moisture and bacteria collect in the folds around the muzzle and eyes, leading to skin infections if not cleaned regularly. A quick wipe-down with unscented baby wipes each day prevents most issues.

Shedding is moderate for most of the year but ramps up in spring and autumn. A rubber curry brush used two to three times a week keeps loose hair under control. Bathing a 90 kg dog is an event in itself — many owners use a hose outdoors or invest in a walk-in shower. Professional grooming for a Mastiff costs significantly more than for average-sized dogs simply because of the time and product volume involved.

One underrated care item: bedding. English Mastiffs need soft, supportive bedding to prevent calluses on their elbows and hocks, and to cushion aging joints. An orthopaedic dog bed rated for 80–100+ kg will cost $150–$400 but is worth every cent.

Exercise Needs

Unlike many large breeds, the English Mastiff is not a high-energy dog. They need about an hour of moderate exercise per day — a steady walk, a wander around the yard, maybe a slow game of fetch. That’s usually enough.

Importantly, English Mastiff puppies should not be over-exercised. Their bones and joints are growing rapidly under enormous body weight, and excessive running or jumping during the first two years can cause lasting damage to growth plates. The general rule is five minutes of walking per month of age, twice daily, until they’re fully grown.

Australian climate warning:

English Mastiffs are extremely heat-sensitive. Their large body mass combined with a shortened muzzle (brachycephalic tendency) makes them vulnerable to heatstroke — a genuine life-threatening risk during Australian summers. Never exercise a Mastiff in the heat of the day. Early morning or after sunset only during warm months. Air conditioning is not a luxury for this breed — it’s a necessity. If temperatures exceed 28°C, keep outdoor time brief and supervised.

Swimming is an excellent low-impact exercise option if your Mastiff takes to water, though many don’t. Nose work and puzzle toys provide mental stimulation without physical strain. Avoid agility, sustained running or anything that puts repeated stress on their joints.

An under-exercised Mastiff won’t destroy your house the way a bored Border Collie would — they’ll just get fat. And obesity in this breed is a fast track to shortened lifespan, joint failure and increased bloat risk.

Training Guide

Training an English Mastiff is an exercise in patience. They’re intelligent dogs who understand commands perfectly well — they just don’t see the urgency. Everything happens at Mastiff pace, which is to say, slowly.

Age	Training Focus	Honest Difficulty
8–16 weeks	Socialisation (critical), basic commands, crate training, bite inhibition	Moderate — they’re sweet and food-motivated but already surprisingly strong
4–6 months	Leash manners (start now before they outweigh you), household rules, handling	Moderate — cooperative but easily distracted
6–18 months	Continued socialisation, basic obedience, impulse control around visitors	Moderate–Hard — adolescent stubbornness peaks; they’re now 50–70 kg
18 months–3 years	Reliable obedience, guarding behaviour management, polite greetings	Moderate — maturing but still testing boundaries
3+ years	Maintenance, trick training, ongoing socialisation with strangers	Easy–Moderate — settled and cooperative if foundations were laid early

Socialisation is the single most important investment you’ll make in this breed. An unsocialised English Mastiff that’s fearful or aggressive towards strangers is genuinely dangerous at this size. Expose them to as many people, places, sounds and situations as possible between 8 and 16 weeks, and continue throughout their life.

Leash training must start early. A full-grown male Mastiff can drag most adults down the street if he hasn’t learned to walk politely. Positive reinforcement — food rewards, praise, short sessions — works far better than force. Harsh corrections will shut a Mastiff down completely; they’re sensitive dogs who respond to trust, not intimidation.

Puppy school and basic obedience classes are strongly recommended, even if you’re an experienced dog owner. The benefit isn’t just training — it’s structured socialisation with other dogs and people during the critical developmental window.

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Cost of Ownership (AUD)

Owning an English Mastiff in Australia is expensive. There’s no way to sugarcoat it. Everything — food, vet care, bedding, medication — is scaled up for a giant breed. If budget is tight, this is not the dog for you.

Expense	Estimated Annual Cost (AUD)	Notes
Puppy Purchase Price	$800–$3,000+ (one-off)	ANKC registered breeders. Show lines at the top end. Expect waiting lists.
Food (premium giant-breed)	$2,000–$3,500/year	6–8+ cups of quality dry food daily, plus fresh supplements. This is your biggest recurring cost.
Vet Check-ups & Vaccinations	$500–$900/year	Annual wellness exam. More frequent from age 5+. Giant-breed anaesthesia costs more.
Pet Insurance	$1,440–$2,400/year	Non-negotiable. Comprehensive cover for giant breeds. Read exclusions carefully.
Flea, Tick & Worming	$300–$500/year	Higher doses = higher cost. Monthly preventatives essential in Australia.
Grooming & Cleaning Supplies	$200–$500/year	Drool towels, wrinkle wipes, shampoo, brushes. It adds up.
Training	$300–$800 (first year)	Puppy school + basic obedience. Budget for a few private sessions for leash work.
Bedding & Equipment	$500–$1,500 (one-off, replace as needed)	Giant orthopaedic bed ($200–$400), XXL crate ($200–$400), heavy-duty leads/collars.
Joint Supplements	$300–$600/year	Glucosamine and chondroitin. Start from 2–3 years of age or as vet recommends.
Toys & Enrichment	$100–$300/year	They destroy standard toys. Buy heavy-duty or indestructible options.

First-year total estimate: $7,000–$15,000+ AUD

(including purchase price, setup costs, initial vet work and food).

Annual ongoing cost: $5,500–$9,000+ AUD

(food, insurance, vet, preventatives, supplements and miscellaneous).

Rescue is an option worth considering. Mastiff rescue organisations occasionally have dogs available for $300–$800 including desexing, vaccinations and microchipping. However, rescued Mastiffs may come with unknown health histories, so factor in the cost of a thorough veterinary assessment.

For breeder enquiries in Australia, start with DogzOnline (dogzonline.com.au) or contact Dogs NSW, Dogs Victoria, Dogs QLD or your relevant state canine council for a list of registered English Mastiff breeders. Notable Australian kennels include Doghaven (NSW) and DeHond Mastiffs (QLD), both of which health-test their breeding stock.

Is the English Mastiff Right for You?

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• The English Mastiff is one of the most gentle, loyal and devoted dogs you’ll ever own — but the commitment is enormous. They cost more to feed, insure and treat than almost any other breed, and their lifespan is painfully short.
• In Australia, heat management is a genuine safety concern. If you don’t have air conditioning and a plan for summer, this breed is not safe in your home.
• For the right owner — financially stable, experienced, homebodies with space and a tolerance for drool — the English Mastiff will give you the most love per kilogram of any dog alive.

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Frequently Asked Questions