If you’re looking for a dog that brings both size and smarts to the table, then Alert XL Dog Breeds are right up your alley. These big dogs are more than just massive—they have big hearts, strong protective instincts, and the kind of loyalty that makes them ideal guardians. While small breeds are great for apartments and travel, XL dogs need space, time, and plenty of love to truly thrive.
They’re usually calm, observant, and always on the lookout for anything out of place. That means your home is likely to be very safe with one of these by your side. But keep in mind—having a dog of this size comes with responsibility. You’ll need a big yard, time for long walks, and the ability to handle their strength. If you can meet their needs, the payoff is amazing companionship from a dog that wants nothing more than to be near its people.
1. Great Dane
The Great Dane is one of the most recognizable large dog breeds thanks to its towering height and gentle personality. These dogs originally came from Germany where they were used for hunting wild boar, a job that required strength and courage. Over the years, they’ve become more known for their calm and friendly nature, making them great family pets. A male Great Dane can grow up to 32 inches tall and weigh around 175 pounds, while females are only slightly smaller. They’re often called “gentle giants” because of how loving and sweet they are. They don’t bark much unless something is wrong, and they’re friendly even with new people.
However, their huge size means they can easily bump into people or knock things over, especially if they get excited. Training is important, but it takes patience because they’re not always quick learners. They like relaxed activities and need about two hours of exercise a day to stay healthy. With the right care, they become loyal and loving pets that enjoy being with their family at all times. Fun fact: Great Danes were once used to guard estates from spirits—like a real-life Scooby-Doo!
2. Borzoi
The Borzoi, also called the Russian Wolfhound, is a tall and graceful dog with long legs and a silky coat. These dogs were once used by Russian nobles to hunt wolves, but today they are more about lounging than chasing. They are elegant and calm, with a quiet, thoughtful personality. Male Borzois can weigh between 75 to 105 pounds and stand around 28 inches tall, while females are usually smaller. They’re very affectionate but tend to be reserved and don’t like loud or chaotic environments. Because they were bred to chase fast animals, they still have a strong instinct to run after anything that moves.
That’s why it’s important to have a secure fence and never let them off-leash unless they’re in a safe, enclosed area. Borzois are intelligent but independent, so they may pause before following commands. They respond best to gentle training with short, fun sessions. They don’t need hours of exercise, but they do enjoy running and stretching their legs every day. Borzois are best for families with older kids and a calm household. The name “Borzoi” comes from the Russian word for “swift,” which suits them perfectly because they’re incredibly fast when they want to be.
3. Scottish Deerhound
The Scottish Deerhound is a large dog with a wiry coat and a graceful, noble appearance that feels like it belongs in a medieval painting. These dogs were once used by Scottish nobles to hunt deer across rugged landscapes. They’re known for their gentle personality and calm behavior, making them a wonderful choice for people who want a peaceful but powerful companion. Deerhounds are tall—some can reach up to 32 inches in height and weigh over 100 pounds. Even though they’re big, they are quiet and gentle indoors, often just wanting to be close to their humans.
As puppies, they are playful and a little clumsy, but they grow into calm, affectionate dogs with the right training. They do need space to run and play, but they are not overly energetic. They prefer a calm environment and enjoy spending time with people. Early socialization is important so they can learn how to interact with other pets and people. Although their lifespan is usually only 8 to 11 years, every moment with a Scottish Deerhound is filled with loyalty and love. These dogs are natural chasers, so off-leash time should always happen in a fully fenced yard.
4. Irish Wolfhound
The Irish Wolfhound is not only one of the tallest dog breeds in the world, but also one of the kindest. These dogs were originally bred in Ireland to hunt wolves and protect homes, and they’ve been admired for centuries for their bravery and gentle spirit. Males can stand up to 36 inches tall and weigh up to 180 pounds, making them massive even among XL breeds. Despite their size, they are incredibly gentle, calm, and loving. They are not good guard dogs because they don’t bark much and prefer peace to confrontation.
They do, however, have a strong urge to chase, so they need a fenced yard and must be kept on a leash during walks. Irish Wolfhounds need daily exercise to stay fit, but they’re not hyper dogs. Health-wise, they are at risk for conditions like bloat, heart problems, and bone cancer, so regular vet visits are a must. These dogs are perfect for families who want a calm, loyal companion and have space for a large dog. They may not live long—usually around 6 to 10 years—but they make those years count with their deep love and gentle nature.
5. Tibetan Mastiff
The Tibetan Mastiff is a majestic and powerful dog with a history that goes back thousands of years. Originally bred to guard monasteries and flocks in the Himalayan Mountains, these dogs are calm, protective, and loyal. They can grow up to 26 inches tall and weigh over 100 pounds. Their thick fur and serious expression give them a lion-like look that matches their strong guarding instincts. Tibetan Mastiffs are very affectionate with their families but are naturally wary of strangers. They’re not aggressive without reason, but they take their job as protectors seriously. Early training and socialization are very important to make sure they grow into well-behaved adults.
These dogs are intelligent but independent, meaning they’ll think before following a command. They don’t like long training sessions and prefer to work on their own terms. They don’t need a lot of exercise but enjoy having a job to do and space to roam. They may not get along with other dogs of the same gender, so careful introductions are important. Fun fact: in the 1970s, some smugglers tried using Tibetan Mastiffs to guard illegal cargo—proof of how serious these dogs can be when protecting their space.
6. Leonberger
The Leonberger is a huge, friendly dog that was originally bred in Germany to resemble a lion. This breed was created by combining several large dogs, including the Saint Bernard and Newfoundland, and was designed to be a companion for royalty. Leonbergers can grow to be over 32 inches tall and weigh up to 170 pounds. These dogs are known for their loving nature and devotion to their families. They’re calm and gentle indoors but love to play outside in the mud, water, or snow. They do best in homes with a large yard where they can run around and explore.
Leonbergers are smart but can be a bit stubborn, so early training and socialization are very important. They enjoy having tasks to do, whether it’s pulling carts, playing games, or going on hikes. They need at least an hour of exercise each day to stay happy and healthy. Because of their size, they don’t live as long as smaller dogs—usually about 7 years—but they pack a lot of love and joy into every moment. These dogs are not just big in size, but also big in heart and loyalty.
7. Boerboel
The Boerboel is a large, muscular dog that was developed in South Africa to guard homes and farms from dangerous animals. Their name means “farmer’s dog” in Afrikaans, and that’s exactly what they are—loyal, strong, and protective. These dogs can weigh up to 200 pounds and stand up to 27 inches tall. Despite their powerful build, they are very affectionate with their families and good with children. However, because they are so strong and confident, they are not the best choice for first-time dog owners.
Boerboels need someone who can provide clear rules and consistent training. They are very smart and learn quickly but can be stubborn if they’re not handled properly. Socializing them early is very important so they can feel comfortable in different environments and around new people. They aren’t aggressive for no reason, but they won’t hesitate to protect their family if they sense a threat. Grooming them is simple—they only need brushing once a week and occasional baths. Boerboels are loyal, watchful, and make amazing protectors for families who understand how to care for a big, bold dog.
FAQs
Are XL dog breeds good with children?
Yes, many XL breeds are gentle and loving with kids, but due to their size, supervision is important—especially around small children.
Do XL dogs need a lot of space?
Generally, yes. Most XL breeds thrive in homes with a yard or easy access to large outdoor areas where they can move freely.
How much do XL dog breeds eat?
XL dogs have larger appetites and can eat 4–8 cups of high-quality food daily, depending on their breed, size, and activity level.
Can XL dog breeds live in apartments?
Some calm XL breeds, like Great Danes, can adapt to apartment living with regular exercise—but spacious living is usually best.
Aaron is a dedicated pet enthusiast and writer with a special passion for dog breeds and animal care. With years of hands-on experience and research, he shares practical advice, fun facts, and heartwarming stories to help pet owners better understand and care for their furry companions. Whether you're a first-time pet parent or a lifelong dog lover, Aaron’s insights are here to guide and inspire.