How to Train a Mastiff
He enters the room slowly. Not in a hurry. Not excited. He just sits down, observes, considers. He has a look that asks for nothing. He isn't looking for approval. He knows who he is.
A Mastiff is not a dog that needs to prove anything. He already proved it. Two thousand years ago, in Roman arenas, against lions and bears. Five hundred years ago, on the battlefields of Agincourt, guarding his wounded master through the night. A hundred years ago, on English estates, protecting entire families without biting even once.
He hasn't changed since. The body grew, but the soul stayed the same. A Mastiff arrives in the world already complete.
The only question is: are you ready to be the owner of a dog like this?
What He Was Made For
You cannot understand a Mastiff without understanding his history. And it begins not in England, but long before it.
As early as 55 BC, when Julius Caesar arrived in Britain, he encountered giant dogs that amazed him. These dogs, called Pugnaces Britanniae — fighters of Britain — were unlike anything the Romans knew. They didn't bark without reason. They didn't attack without warning. They simply stood and guarded.
Grattius Faliscus, a Roman poet writing at the beginning of the first century AD, wrote that these British dogs easily defeated the Greek Molossus in fights. The Romans were so impressed that they sent them back to Rome, to the Colosseum arenas. There, against lions, bears, and gladiators, the Mastiff proved itself again and again.
But that wasn't its true purpose. The arena fights were entertainment for the rich. The Mastiff's real job was completely different.
Gaston Phoebus, author of the most important hunting book of the 14th century, described the Mastiff in simple words: "to keep his master's beasts and his master's house." That's it. Not to hunt. Not to chase. Not to kill. To guard.
And the word "guard" means something completely different for a Mastiff than for an ordinary guard dog. The Mastiff doesn't guard because he's angry. He guards because that's his presence. When he sits at the door of the house and quietly watches, he says more than any bark. The immense potential housed in his body — the 200 pounds, the powerful jaws, the unwavering courage — is the threat. Nothing more is needed.
For centuries, the Mastiff guarded English estates. He was the dog of nobility — not for status, but because he was reliable. The estates of King Henry VIII required Mastiffs to guard the royal properties. The criminal law of the time, called the Forest Laws, explicitly dictated how Mastiffs were kept. A dog that guarded the royal forests received a special name: "bandog" — a dog chained at night and released by day.
But in the 19th century, something changed. In 1835, bull and bear baiting were banned in England — the cruel sport the Mastiff had participated in for generations. The breed nearly disappeared. Why keep a giant dog that eats 4 pounds of meat a day, if it has no job? The answer came from the noble families. They continued to breed Mastiffs not because they were useful, but because they were part of the landscape. The estate's emblem.
Then came World War II. The British Mastiff was nearly wiped out completely. By the end of the war, only 14 registered Mastiffs remained in all of Britain. The breed was saved thanks to American breeders, who returned to Britain blood that had left years before. Today, the Mastiff is still considered a vulnerable breed in its homeland — only 104 puppies were registered in Britain in 2020. But worldwide, it has returned. Returned to what it always was: a gentle giant.
The Mastiff doesn't live long. 6 to 10 years on average. And that might be the price of being so big — the heart works hard, the joints carry heavy weight. Every year with a Mastiff is a treasure. He knows it. He lives accordingly.
He hasn't changed since then. The body grew, but the soul remains the same. A Mastiff arrives in the world already complete.
There is a well-known story about Sir Piers Legh, an English knight wounded at the Battle of Agincourt in 1415. His Mastiff bitch stood over him for hours, preventing French soldiers from approaching. After he died of his wounds in Paris, his dog was returned to the Lyme Hall estate, where she whelped puppies that became one of the oldest and most famous bloodlines of the breed.
A dog like that isn't built in a day. It takes generations of natural and artificial selection. And two thousand years is a very long time.
How the Job Shaped the Character
There's a fundamental difference between a Mastiff and most other dogs. Most dogs were bred to do something — chase, sniff, herd, retrieve. A Mastiff was bred simply to be.
"To be" isn't an action. It's presence. And that's why the Mastiff is such a quiet dog, so calm, so even-tempered. He doesn't need to get excited. His appearance does the work.
But there's a price for this. A dog bred to be present instead of doing is also a dog that thinks slowly. He doesn't respond immediately. He considers. Observes. Decides. Then acts — or not.
Many owners mistake this for stubbornness. But it's not. It's a slow processing speed. A Mastiff isn't refusing to do what you asked. He simply needs a second to think about it. And if you pressure him, he may decide you're not the owner he trusts.
Because a Mastiff's loyalty isn't given automatically. He examines you. Not out of suspicion, but out of a desire to know who's standing before him. He wants to understand if you're worthy of his trust. And if you earn him — he'll be the most loyal dog you'll ever know. If you lose him — he'll simply disconnect.
This sensitivity is perhaps the breed's least understood trait. He looks formidable, a walking sledgehammer. But inside, he's very sensitive. Shouting, harsh punishment, or even an angry tone of voice — can shut him down completely. He won't fight you. He'll simply withdraw and stop cooperating. And that's far worse, because now you have a 200-pound dog that doesn't care about you.
His natural instinct to protect the family is truly remarkable. But if not properly trained, he can become a dog who protects you from everything — including the mailman, the neighbor, and the child who came to play. Not out of aggression, but out of a sense of duty. He doesn't understand the difference between a real threat and an innocent visitor. That's his job, and he takes it seriously.
How to Train a Mastiff
Here's the most important principle: in Mastiff training, what you do before the dog reaches 8 months old matters three times more than what you do after. Because at 8 months, a Mastiff already weighs over 100 pounds. And after a year — 150. You don't have the privilege of fixing mistakes later.
Jumping — from Day One
The biggest mistake Mastiff owners make is letting the puppy jump on them. "He's so small and cute, what's the harm?" And then the puppy grows, barely a year old, and he jumps on guests and knocks them over. The solution? From day one: four paws on the floor = reinforcement. Jumping = zero attention. You turn yourself into a wall. Don't look, don't speak, don't touch. The moment four paws hit the ground — hugs and treats.
Loose Leash Walking
A Mastiff that pulls on leash isn't just unpleasant. It's dangerous. A 200-pound dog pulling forward can dislocate your shoulder or drag you into traffic. A front-clip harness is mandatory from day one. Not a collar, not a choke chain. A front harness that allows you to control movement without pain.
Iron rule: loose leash = keep walking. Tight leash = stand still like a statue. Don't move an inch until the dog releases tension. This takes patience. Especially with a Mastiff, whose slow decision-making affects the pace of training too. But it works. I don't know a well-trained Mastiff that hasn't been through this exercise.
Socialization — Not an Option, a Must
A Mastiff that hasn't met enough people, places, and experiences as a puppy will become a dog that fears everything new. And that fear in a 200-pound giant expresses itself as over-protection. A dog that "guards" you from strangers isn't affectionate — it's insecure.
I see this all the time. Owners proudly say "my Mastiff guards the house and hates strangers." But that's not pride. That's a red flag. A properly trained Mastiff doesn't hate anyone. He's simply calm and watchful. When he sees a stranger, he looks, assesses, and if there's no danger — he goes back to napping.
Socialization should start the day you bring him home. Don't wait until 4 months old. Every day — someone new, somewhere new, a new experience. Under control, without pressure. The reward: a dog that feels safe in the world. And the safest dog is also the one least likely to bite.
Short Sessions, Immediate Rewards
A Mastiff concentrates for short periods. Trying to sit with him in a 45-minute training session will end with him simply lying down and ignoring you. Five minutes, two or three times a day — that's what works. A game of "sit" and "down" with a treat, a break, then again.
He loves food. A Mastiff will almost always be food-motivated. But social reinforcement works too — a kind word, a stroke, a feeling that he made you happy. Because at the end of the day, what a Mastiff really wants is to know he's doing his job right. And from his perspective, his job is you.
Crate Training — Not Imprisonment, Security
A Mastiff needs to know he's safe even when you're not home. Crate training isn't cruel — it's necessary. A strong crate appropriate for a Mastiff puppy (note — he'll grow fast) gives him the feeling of a den. A place where no one bothers him.
But don't make the mistake of locking him in for hours without preparation. Proper crate training takes weeks. Start with the door open, treats inside, meals in the crate. Close for a minute, open. Close for five minutes, open. Slowly, patiently. Like all Mastiff training.
A Mastiff raised without a crate may develop separation anxiety when left alone. Not because he's dependent — but because he's a dog connected to home and family. Sudden separation is hard on him. The crate gives him a safe place to wait. Not a place to escape from.
Dealing with Stubbornness
There are moments when the Mastiff simply decides he's not moving. He lies in the middle of the living room, looks at you with big eyes, and doesn't budge. Not for food. Not for a hug. Not for anything.
In most cases, it's not stubbornness — it's information processing. A Mastiff thinks slowly. He weighs the decision. Sometimes he needs another second. Sometimes another five. And what you call "refusal" is simply "I'm still thinking."
The biggest mistake is to panic. To shout. To yank the collar. Because what happens then is the opposite: the Mastiff decides you're not in control of yourself, and if you're not in control — why should he listen?
The solution: wait. Give him a chance to process. And if he genuinely refuses — take a step back in training, simplify the request, and rebuild. Always remember that the Mastiff isn't rebelling — he's simply deciding if it's worth his while.
Comparisons: Mastiff vs Canaan Dog
The best way to understand a Mastiff is to invert him. A Mastiff and a Canaan Dog are two ends of the same axis: a dog that works through presence versus a dog that works through agility.
Mastiff enters a room and he's already there. He doesn't need to do anything. His physical presence fills the space. He observes, considers, and if necessary — acts. His slowness is a feature, not a flaw. It allows him to make the right decisions.
Canaan Dog is never truly at rest. Even when lying down, his eyes are scanning, his ears moving, his body ready to spring. He survives through speed and alertness. Every suspicious sound, every movement — he's already there.
Both dogs are excellent guardians. But they guard in completely different ways. The Mastiff guards like this: "I'm here. Come closer if you dare." The Canaan Dog guards like this: "I saw you before you saw me. And I already know what you are."
The Mastiff will bark once — a deep bark that makes walls tremble. Then he'll wait. The Canaan Dog will bark 15 times in a row, and if something's wrong — he'll already have fled or attacked.
In training terms: a Mastiff needs to learn that cooperation pays off. A Canaan Dog needs to be convinced that cooperation isn't dangerous. A Mastiff will walk with you down the street if he understands why. A Canaan Dog will walk with you only after deciding you can be trusted.
Do you see the difference? The Mastiff wants to please. But at his own pace. The Canaan Dog isn't sure he wants to at all.
Mastiff vs Bulldog
And from the opposite direction: Mastiff versus English Bulldog. Both are brachycephalic breeds. Both were bred for bull baiting. Both are known for stubbornness. But the difference between them is enormous.
The Bulldog is a small dog in a big dog's body. He has the ego of a Mastiff inside a 55-pound frame. He thinks he can do anything. He'll also try.
The Mastiff is the opposite. He's a big dog that acts like he's small. He doesn't need to prove anything. He has no ego. He's simply confident.
The Bulldog will attack a problem. The Mastiff will measure it first. Both will reach the same result, but the Mastiff gets there without breaking a sweat.
FAQ
Does a Mastiff bark a lot?
No. This is one of the quietest breeds. A Mastiff barks when needed — and only then. One bark, deep, like drums at the end of a symphony. It says "I've noticed you." And if he wants to intimidate, he doesn't bark — he simply stands in front of the threat.
Is he good with children?
The Mastiff is one of the best dogs with children — provided he grows up with them. He has a patience that no other breed has. He lets a child sit on him, pull his ear, climb on him. But — and this is a big but — because he's so heavy, he may accidentally knock a child over. Always supervise when there are small children around a Mastiff. Not because he's dangerous, but because he's enormous.
How much exercise does he need?
Much less than you think. A Mastiff doesn't need 10-kilometer runs. 45-60 minutes of walking per day, with plenty of opportunities to sniff and explore, is enough. He prefers resting on the couch to running in the park. You need to ensure he gets moderate movement — not for him, but for his joints.
What's the biggest health risk?
Bloat — GDV. It's a life-threatening condition that affects deep-chested breeds. The stomach twists on itself, and blood stops flowing to internal organs. It happens fast, within hours. The signs: unsuccessful attempts to get up, trying to vomit without bringing anything up, a distended stomach. Don't wait. Take him to the vet immediately. Small meals throughout the day, rest after eating, and avoiding activity right after meals — can reduce the risk. But it's always there. One of the prices of being giant.
Why is he sensitive to heat?
The Mastiff is a mild brachycephalic breed — his muzzle is short relative to his body size. He doesn't cool himself efficiently. On a hot day, after 10 minutes of walking, he'll start panting heavily. In the Israeli summer — a real danger. Walks early morning or after sunset. Water always available. Don't leave him in the yard without shade. And if the air conditioner is on at home — he'll be the happiest guest.
Who is a Mastiff for?
A Mastiff is for experienced owners who understand large dogs. Not for beginners. Not for people without time. Not for people living in a small apartment without yard access. Not for people who love athletic dogs. A Mastiff is for someone who wants a quiet presence, a dog that will accompany him with dignity, and who understands that the big body doesn't mean a big personality — but a big responsibility.
To Sum Up — Not Static
Some say the Mastiff is a "couch dog." That he's lazy. That he's just big. Those are people who don't understand anything.
The Mastiff isn't lazy. He simply doesn't waste energy. He has a vast reservoir of power, and he saves it for the right moment. Like a samurai who doesn't draw his sword for nothing. Like a warrior who doesn't raise his voice without cause.
In a thousand years of history, the Mastiff learned one thing: the greatest power is not the one you use all the time. The greatest power is the one you have but don't need to use.
So how do you train a Mastiff? Slowly. With patience. With respect. And always — with a towel within reach.
Sources
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- Gaston Phoebus (1387–1389). Livre de Chasse. Description of the Mastiff: "to keep his master's beasts and his master's house."
- MacLean EL, Snyder-Mackler N, vonHoldt BM, Serpell JA. Highly heritable and functionally relevant breed differences in dog behaviour. Proc Biol Sci. 2019;286(1912):20190716. PMID: 31288703.
- Salonen M, Mikkola S, Niskanen JE, Hielm-Björkman A, Lohi H. Breed, age, and social environment are associated with personality traits in dogs. iScience. 2023;26(5):106691.