Ever dreamed of sharing your life with a dog so big it feels like having a gentle bear for a best friend? Full-grown giant dog breeds aren’t just large — they’re legendary. They bring a unique kind of magic into a home, the kind that turns every walk into a head-turning event and every cuddle session into a full-body experience.
But what’s it really like living with a giant among dogs? It’s not all about size — it’s about heart, loyalty, and a presence that fills a room before they even step through the door. These gentle giants have a way of redefining what companionship means, blending strength and sweetness into one unforgettable package.
If you’re thinking bigger is better, you’re in for a wild, wonderful ride. Ready to meet the colossal canines who will steal your heart (and maybe your couch)? Let’s dive in — just be warned, small living spaces might not stand a chance!
Full-Grown Giant Dog Breeds
10. Dogue de Bordeaux
When you first lay eyes on a full-grown Dogue de Bordeaux, it’s hard not to stare. Towering, stocky, and wrapped in wrinkles, this breed carries an old-world charm that’s both intimidating and lovable. But don’t let that serious face fool you — underneath all that muscle is a heart made of pure gold.
This giant breed is famously loyal, sticking to its family like glue. If you’re thinking of a guard dog that doubles as a giant cuddle buddy, the Dogue de Bordeaux fits the bill perfectly. They don’t just guard; they adore their people. Ever wanted a personal bodyguard who thinks you’re the greatest thing since sliced bread?
Training this big guy takes patience and a whole lot of positive reinforcement. Hill’s Pet states that they’re intelligent but sometimes a bit… let’s say “headstrong.” If you’re not consistent, they’ll gladly make their own house rules — and trust me, they have a very creative set!
One thing you’ll notice? They’re hilariously lazy. Despite their powerful physique, Dogues love lounging like oversized cats. Don’t be surprised if your massive beast insists on squeezing onto your lap or snoring up a storm on the couch. Who says big dogs aren’t lap dogs?
Grooming a Dogue de Bordeaux isn’t hard, but you do need to keep those wrinkles clean. Moisture can get trapped, leading to infections if you’re not careful. Think of it like wiping down a very large, very affectionate accordion — weird but weirdly fun!
Fun Fact:
The Dogue de Bordeaux starred in the classic movie Turner & Hooch — and yep, that endless drool? 100% real and 100% part of the charm.
9. Scottish Deerhound
If you ever wanted to live with something that looks like a medieval knight’s loyal sidekick, meet the full-grown Scottish Deerhound. These lanky giants are the true aristocrats of the dog world — elegant, ancient, and built for pure speed. But don’t be fooled by their athletic frame; these dogs are as mellow as a lazy Sunday morning.
When it comes to temperament, Deerhounds are calm, composed, dignified, and almost absurdly gentle, says PetMD. They’re the kind of dog that greets strangers with polite curiosity rather than barking up a storm. If you’re looking for a “watchdog,” think again — these dogs are lovers, not fighters.
One thing that really sets the Scottish Deerhound apart is its hunting background. Originally bred to chase and take down wild deer in the rugged Scottish Highlands, these dogs needed both insane speed and stamina. No wonder they’re often nicknamed the “Royal Dog of Scotland.” How many breeds can brag about being a royal favorite?
Their wiry coat is surprisingly low-maintenance for such a majestic look. A quick weekly brush usually keeps them neat, and they don’t shed heavily. Isn’t it refreshing when a dog looks high-maintenance but acts totally chill about it?
Lastly, because of their deep chests, Scottish Deerhounds are at risk for bloat — a serious, often fatal condition. Owners should learn the signs and feed them in smaller, more frequent meals. Keeping them healthy is part of the deal when you bring home a dog that’s half-athlete, half-nobleman.
8. Newfoundland
Imagine a dog so big and gentle it could basically be your full-time emotional support bear. That’s the Newfoundland — a full-grown giant who’s as sweet as a marshmallow but strong enough to rescue drowning sailors. Honestly, could a dog be any more heroic?
Newfoundlands are famous for their natural swimming skills. Thanks to their webbed feet and thick water-resistant coat, they practically glide through the water. This is literally a furry lifeguard who loves you unconditionally.
Temperament-wise, these gentle giants are unbeatable. They’re patient with kids, tolerant of chaos, and downright nurturing. You know that warm, fuzzy feeling you get from a favorite blanket? Living with a Newfoundland feels like that — but with a heartbeat and a wagging tail.
Despite their size, Newfoundlands aren’t hyper or destructive. VCA states that they’re cool, calm, and surprisingly graceful around the house. Sure, they drool like they’re getting paid for it — but when that big, soulful face looks up at you, you’ll barely even care. Can you really resist that?
Healthwise, they can struggle with joint issues, heart problems, and, like other big breeds, a shorter lifespan. Regular vet care, healthy diet, and controlled exercise can make a world of difference. After all, wouldn’t you want your furry best friend sticking around as long as possible?
Lastly, space matters — a lot. Newfoundlands need room to stretch those massive paws, plus a cool spot to beat the heat. They’re not built for tiny apartments or tropical heat waves. Think you can offer a mini indoor ocean breeze? Then a Newfie might just be your perfect match.
7. Leonberger
Ever wished you could live with a real-life lion… but, you know, one that loves belly rubs? That’s the Leonberger. This full-grown giant looks like it walked straight out of a fantasy movie — thick mane, massive paws, and eyes that basically say, “I love you” 24/7.
Leonbergers were actually bred to resemble lions, and boy, did they succeed. But don’t let the fierce looks fool you. These dogs are gentle, goofy, and deeply attached to their families. Imagine having a bodyguard who also thinks they’re a lap dog — sounds wild, right?
Socialization is crucial for a Leonberger. These dogs grow fast and big, and without early training, they might think it’s totally fine to bowl over guests out of excitement. Want a 150-pound greeting tackle every time you come home? Probably not.
When it comes to energy, Leonbergers are a surprising mix. They love a good hike, a long swim, or a play session… but they’re also champions of the afternoon nap. One minute they’re sprinting across the yard, the next they’re snoring louder than your neighbor’s old truck.
AKC states that their thick, water-resistant double coat means grooming isn’t optional — it’s survival. Regular brushing, at least a few times a week, is a must unless you want to live in a cloud of golden fluff. (And trust me, you will find hair in places you didn’t even know existed.)
Leonbergers are pretty healthy for a giant breed, but like most big dogs, they’re prone to hip dysplasia and heart issues. Getting them from a responsible breeder and keeping up with vet care can go a long way. Wouldn’t you do anything to keep that huge, happy face around longer?
6. Anatolian Shepherd
If you’ve ever dreamed of a dog that could practically run its own security company, the full-grown Anatolian Shepherd would be your first hire. These giant, powerful dogs are natural guardians, bred for thousands of years to protect flocks, and they take their job very seriously.
Anatolian Shepherds aren’t the kind of dogs who need constant commands. They think independently, assess situations on their own, and act if they feel something’s off. Want a dog who could probably outsmart half your neighbors? Meet your match right here.
Despite their serious work ethic, Anatolians are incredibly calm and affectionate with their families, says Royal Canin. They’re not clingy, but they form deep, unbreakable bonds. Picture a dog who watches over you like a silent, oversized guardian angel — sounds pretty epic, right?
Exercise needs are surprisingly moderate for such a powerful breed. They love having space to roam and a job to do, but they’re not hyperactive. Give them a yard and a task — even if it’s just “guard the garden” — and they’re happy. Isn’t it refreshing when a giant dog isn’t bouncing off the walls?
Their short, thick coat is built for harsh weather, needing only occasional brushing. But here’s a heads-up: twice a year, they shed their undercoat like they’re trying to knit you a new pet. Got a good lint roller?
Finally, Anatolians aren’t for everyone. They need confident owners who respect their instincts and aren’t looking for a “people pleaser.” If you want a buddy who thinks for himself but would still lay down his life for you? This ancient guardian might just steal your heart.
5. English Mastiff
Ever imagine what it’s like to share your house with a small horse? Meet the English Mastiff — one of the largest full-grown dog breeds in the world, both in height and sheer, jaw-dropping weight. When a Mastiff strolls by, you feel it like a slow-moving earthquake.
Despite their imposing size, English Mastiffs are famously gentle and mellow, says WebMD. These are not hyper, jumpy dogs; they’re slow, steady, and dignified. If you want a dog that’s cool as a cucumber even when the vacuum’s roaring, the Mastiff’s your guy.
Their loyalty and devotion run bone-deep. Mastiffs bond tightly with their families, and while they’re not aggressive without reason, their mere presence is usually enough to deter any troublemaker. Who needs a security alarm when you have 200 pounds of love and muscle by your side?
When it comes to grooming, Mastiffs are low-maintenance. Their short coat needs just a weekly brush. However, you will deal with serious drooling, especially after meals or drinks. If you’re squeamish about slime trails on your walls… maybe grab a mop and a sense of humor!
Healthwise, English Mastiffs face challenges like hip dysplasia, heart problems, and a shorter lifespan. High-quality food, joint supplements, and regular vet visits can help maximize their time with you. Isn’t every extra happy year with a friend like this worth the effort?
4. Great Pyrenees
If you think “majestic” and “massive” don’t usually go together, you’ve clearly never met a full-grown Great Pyrenees. These towering white beauties look like they stepped straight out of a fairy tale — except instead of fighting dragons, they’re guarding sheep and snuggling kids.
Great Pyrenees were bred for tough work, and it shows. They’re strong, fiercely independent, and have a protective instinct that’s second to none. Ever wonder what it’s like to have a dog that makes you feel like royalty and a VIP under 24/7 protection?
According to Orvis, personality-wise, they’re gentle giants at home but unstoppable guardians when needed. They’ll happily lounge with the family but snap to attention the second something feels off. They’re not paranoid — just deeply tuned to their “pack’s” safety. Isn’t that exactly what you’d want in a best friend?
Their thick double coat is stunning but high-maintenance. Weekly brushing is a must, and during shedding season, you might find yourself buried under clouds of white fluff. Planning to wear black clothes? Good luck — white fur will become your new fashion statement.
Healthwise, Great Pyrenees can face hip dysplasia, bloat, and some bone cancers. Responsible breeding, proper nutrition, and keeping them lean can help extend their lifespan. After all, who wouldn’t want extra years of giant bear hugs and snowy snuggles?
One thing to know — these dogs are night owls by instinct. In the mountains, predators hunt at night, and Pyrs still carry that “midnight patrol” vibe. Don’t be surprised if they do their most serious barking while you’re trying to sleep! Are you ready for a fluffy night watchman?
3. Neapolitan Mastiff
Originally bred to guard estates in Italy, Neapolitan Mastiffs aren’t just about looks — they’re all muscle, courage, and loyalty wrapped in about three layers of saggy skin. Can you imagine a burglar seeing one of these guys staring from behind the gate? Game over.
Despite their “intimidating” vibe, Neos are big softies with their families. They form deep, unshakable bonds and love to be close, like leaning their full 150 pounds on you. Ever had a personal space invader who drools and snores? Welcome to Neo ownership.
Training a Neapolitan Mastiff takes commitment. Omlet states that they’re smart and loyal but also stubborn and independent. Early socialization is critical because once they’re full-grown, you’re not moving them anywhere they don’t want to go. How do you negotiate with a dog heavier than your gym buddy?
Grooming these wrinkly legends is easier than it looks — a quick brush once a week does the trick. But cleaning their skin folds regularly is a must to prevent infections. Think of it like spa days… except, you know, way messier and way droolier.
Health challenges include joint issues, heart problems, and bloat. Regular vet visits, good-quality food, and joint care from an early age can really help. Because honestly, who wouldn’t want to squeeze every extra drooly, snuggly year with these big babies?
2. Saint Bernard
Meet the full-grown Saint Bernard — a towering, lovable hero wrapped in a thick coat and a heart of gold. Originally bred by monks in the Swiss Alps, Saint Bernards were famous for rescuing travelers lost in deep snow. But at home, they’re more about rescuing your heart than dragging you out of avalanches. How could you not fall for those big, soulful eyes?
CKC says that Saint Bernards are affectionate dogs, they are patient, and are famously good with kids. Some call them “nanny dogs” because of how calm and tolerant they are around little ones. If you’re picturing lazy afternoons with a giant dog snuggled up on your lap (or more realistically, on half your body), you’re not wrong.
They’re not high-energy dogs, but they do need daily exercise to stay fit. Short walks, play sessions, and mental stimulation keep them healthy. Skimp on it, and you might find your Saint inventing new “games” like moving your furniture… with his head.
That thick double coat isn’t just for show — it’s made for snowy adventures. But it also means regular grooming is a must. Weekly brushing keeps the shedding manageable, and during the change of seasons? Let’s just say your vacuum is about to become your best friend.
Living with a Saint means adjusting to a slower, gentler pace. They’re not barky, but when they do bark, it’s deep enough to shake the windows. Small apartment? Probably not ideal. Got a big backyard and an even bigger heart? Then a Saint might just be your perfect match.
1. Irish Wolfhound
Ah, the Irish Wolfhound—now here’s a dog that really knows how to own the giant breed category. Standing tall (sometimes taller than a human on its hind legs!), this gentle giant turns heads everywhere it goes. But don’t let its size fool you—these big guys are total softies at heart.
Can you imagine a dog that’s massive but still wants to snuggle on the couch? That’s the Wolfhound for you. Despite their warrior past, they’re famously sweet and calm, like a furry old soul with endless patience. No wonder they’re called the “gentle giants” of the canine world.
They’re not barky or hyper, either. In fact, they tend to be laid-back, even lazy at times—perfect for people who want a majestic companion without the chaos. Plus, they get along great with kids and other pets. What’s not to love?
Irish Wolfhounds aren’t just tall — they’re the tallest dog breed in the world when standing on their hind legs. Imagine a dog that could easily rest his chin on your kitchen counter without even trying. Need a roommate who could also double as a coat rack?
Of course, their size means they need space—got a big yard or room to roam? Great! And yes, their lifespan isn’t the longest, but the loyalty and love they give in those years? Totally worth it. They’re more than a pet—they’re a legacy.
So, why is the Irish Wolfhound our top pick among full-grown giant dog breeds? Because no other breed balances sheer size with such elegance, warmth, and quiet strength. Want a dog that feels like a legend come to life? This is the one.
Fun Fact:
In ancient Ireland, owning an Irish Wolfhound was a symbol of nobility and wealth — they were so prized that only kings and noblemen were allowed to have them!
Conclusion
Full-grown giant dog breeds are truly in a class of their own. These giant dogs, like the Neapolitan Mastiff, Saint Bernard, Anatolian Shepherd, and Irish Wolfhound, bring not just a massive presence but a rich legacy of being top-tier working dogs, guard dogs, and livestock guardians. Originally bred for tasks like pulling heavy loads in the Swiss Alps or protecting flocks with a strong sense of duty, these giant breeds continue to impress with their devotion, strength, and intelligence.
From the majestic Great Pyrenees and sturdy Bernese Mountain Dog to the regal French Mastiff (Dogue de Bordeaux), these biggest dog breeds offer something special for the right owners. Many large breeds, including Italian Mastiffs, thrive on strong leadership, patience, and regular exercise to stay healthy. Training a gentle giant like a Great Dane (known as the tallest breed) or a mountain dog with webbed feet requires time but rewards you with deep loyalty. These powerful dogs are naturally protective yet incredibly gentle and affectionate with kids, children, and their family. Many have thick double coats, droopy faces, lion-like manes, or wrinkly skin, adding to their distinctive charm.
If you have space, dedication to proper training, and the heart to match their size, these dogs become more than just pets—they become family. Always choose responsible breeders who prioritize health and temperament, especially when dealing with breeds prone to life expectancy challenges.
