English Mastiff vs Bullmastiff: The Truth About These Massive, Loving Dogs

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Are you torn between two of the most powerful and surprisingly affectionate giant dog breeds? If you’ve narrowed your choice to the English Mastiff vs. Bullmastiff, you’re not alone. Both breeds command attention with their massive size, loyal hearts, and protective instincts, but don’t let appearances fool you.

Despite their shared heritage, these two dogs are dramatically different in temperament, energy, and lifestyle needs. One is a docile, sofa-loving giant. The other is a stealthy, alert protector bred for security and strength.

In this side-by-side comparison, we’ll break down everything you need to know, from size and behavior to grooming, training, and long-term care, so you can confidently choose the breed that fits your home, lifestyle, and heart.

6 Key Differences Between English Mastiffs and Bullmastiffs

1. Size & Weight
   English Mastiffs are noticeably larger, weighing between 130–220+ pounds.
   Bullmastiffs are smaller but still hefty, typically 100–140 pounds.
2. Temperament
   English Mastiffs are gentle, docile, and laid-back, true gentle giants.
   Bullmastiffs are more independent and alert, with stronger territorial instincts.
3. Energy Levels
   English Mastiffs have lower energy needs and prefer lounging indoors.
   Bullmastiffs are moderately active and require more stimulation and structured playtime.
4. Stranger Friendliness
   English Mastiffs are generally more accepting of strangers.
   Bullmastiffs tend to be wary and protective, making them better natural watchdogs.
5. Feeding Requirements
   Due to their larger size, English Mastiffs are more expensive to feed, requiring up to 10–12 cups daily.
   Bullmastiffs eat less, which means lower ongoing food costs.
6. Grooming & Shedding
   Both breeds shed, but Bullmastiffs may appear to shed less due to their smaller body mass.
   English Mastiffs, especially long-haired variants, may require more frequent grooming.

Breed Origins & Purpose: Gladiators and Gamekeepers

Contrary to general belief, a Mastiff isn’t a breed itself but an umbrella term that describes a group of dogs of similar sizes and statures.

There are, in fact, at least 18 different types of Mastiff dogs, and there is debate as to whether there are more. For example, most people aren’t aware that the German Mastiff is more commonly known as the Great Dane. Both the Bullmastiff and the English Mastiff fall into the “Mastiff” family.

English Mastiff

The English Mastiff is one of the oldest known dog breeds, with lineage dating back over 2,000 years. It is believed to have descended from large Molosser-type dogs introduced to Britain by Phoenician traders around 500 B.C.

Julius Caesar even described them during his invasion of Britain in 55 B.C. as impressive defenders of the land who fought alongside soldiers. He was so impressed by them that he took them back to Rome and used them as gladiators to fight against lions and other beasts (and sometimes men) in the arena.

During the Middle Ages, they served as guard dogs, estate protectors, and large-game hunters. Over time, selective breeding softened their temperament, transforming them from battlefield warriors into gentle family companions while retaining their imposing size and loyalty.

• Descended from ancient Roman war dogs.
• Used in gladiator battles and as guardians.
• Mentioned by Julius Caesar in 55 B.C.

Bullmastiff

The Bullmastiff results from breeding an English Mastiff with an English Bulldog. After several generations, they were officially recognized as a breed in their own right in the mid-1920s in Britain and shortly followed by the U.S. in the early 1930s.

The Bullmastiff’s nickname, “The Gamekeeper’s Night Dog,” is fitting. They were originally bred to be swift and courageous enough to catch a poacher trespassing on his land at night, but trainable and intelligent enough not to maul him to death.

• Bred in 19th-century England to protect estates.
• Known as “Gamekeeper’s Night Dogs.”
• Created by crossing English Mastiffs with Bulldogs.

Today, while both breeds are affectionate and protective, their histories help explain their differences: the English Mastiff is a calm, people-oriented, gentle giant, while the Bullmastiff remains more alert, territorial, and driven by a strong guarding instinct.

Size, Build & Appearance: Who’s The Bigger Giant?

Both of these dogs are HUGE. So, if there’s no extra room in your home, I’m afraid neither is it for you. You also need to consider whether you have enough space on your sofa for them. If not, you have two options: invest in a larger one or be prepared to get squished.

Although, from what I’ve heard, most Mastiff parents wouldn’t have it any other way.

As you can see in the table above, the English Mastiff wins the award for being heavier. In fact, the heaviest dog on record was an English Mastiff named Zorba, who weighed a gigantic 343 pounds. This Guinness World Record was recorded in 1989, and he remains undefeated.

The English Mastiff also holds the title of the world’s strongest dog. So, if your child ever asks for a pony for Christmas, you could probably get away with buying an English Mastiff.

Despite being the larger of the two dogs, the English Mastiff is surprisingly suitable for apartment life as they are docile creatures, and as long as they get their daily walks, they are happy to relax for the rest of the day. Of course, you will be sharing space with a dog the size of a full-grown man, so you must be ok with being snug in small spaces.

English Mastiff:

• Massive, wide frame.
• Can weigh over 200 lbs.
• Short coat, occasional long-hair variation.

Bullmastiffs, on the other hand, are not suitable for apartment life as they are slightly more demanding when it comes to exercise. They need a bit of highly active playtime to expel that extra energy. This is not possible in an apartment. Both dogs do well with crate training as long as the crate is big enough to give them ample room to stretch.

Bullmastiff:

• More compact, muscular.
• Shorter and lighter.
• Slightly less imposing in frame.

English Mastiffs can also have a fluffy coat (a tiny percentage of dogs have this), but owners must note that a very BIG dog with long hair means an impressive amount of shedding.

Temperament & Personality: Gentle Guardian or Loyal Watchdog?

Both the English Mastiff and Bullmastiff are more friendly and docile than their ancestors, but they are still courageous and protective of their family and their estate. They are similar in personality and are both loving, gentle giants who make great family companions. But there are some slight differences in character.

Despite his impressive stature, the English Mastiff is a couch potato and loves nothing more than jumping on the sofa with his family for cuddles. Be ready. They think they are the size of a Chihuahua and aren’t concerned with climbing all over you.

English Mastiff:

• More relaxed and people-oriented.
• Enjoys being physically close to family.

The Bullmastiff is slightly more independent than the English Mastiff, and although he will still jump on the sofa and you, he isn’t as needy and will be happy in his own company for short periods.

The Bullmastiff is known to be slightly more territorial and hostile than the English Mastiff and will drive unknown animals from its territory, so it is essential to ensure that you have fenced-in land.

Bullmastiff:

• More alert, territorial, and protective of property.
• More comfortable with alone time.

Of course, the English Mastiff will still let you know if someone unsavory is around, but they are generally more accepting of strangers in the household. They both like to chew and have strong jaws, so make sure you equip them with toys that can handle some abuse.

Exercise Needs: Which Mastiff Needs More Play?

Both the English Mastiff and the Bullmastiff are average on the exercise scale. The English Mastiff would happily chill with his family all day long. However, in order to keep this large unit healthy, he will require walks to get that heart pumping, despite trying to persuade you otherwise.

On the other hand, the Bullmastiff requires a little more exercise than the English Mastiff, as he is a bit more playful and boisterous than his English cousin.

Alongside their daily walks, the Bullmastiff could do with a short period of active exercise, such as playing fetch or tug of war, in order to expel some of that energy. This is more for his mental stimulation rather than for exercise.

Be cautious of over-exercising both breeds when they are young. Too much exertion can affect the rate at which their bodies grow. Over-exertion can affect their bone and joint growth.

Keep walks short, don’t let them overexert themselves, and work to keep them from jumping. If in any doubt about your pup’s development, speak to your veterinarian.

• English Mastiffs need minimal daily exercise and prefer lounging indoors.
• Bullmastiffs benefit from interactive play and short bursts of activity.
• Over-exercising young Mastiffs can cause joint and bone issues.
• Short, regular walks are essential for both breeds to maintain health.

Training & Intelligence: Which Is Easier to Train?

Both the English Mastiff and the Bullmastiff aren’t particularly easy to train as they do things in their own time, also known as “Mastiff Time.” It is said that the Bullmastiff is the slightly more stubborn of the two, and this extra stubbornness can be blamed on the English Bulldog parent.

It might seem like neither breed is that smart, but it actually speaks more to their independence.

Due to the difficulty you may face training either of the two, it is best to start training them as early as possible. With their protective streak as working guard dogs, socialization is crucial. As always, consistency is the key to training, and the fact that they both love a treat will help you keep them interested.

• Both breeds are intelligent, but operate on their own schedule.
• English Mastiffs are food-motivated and respond to consistent training.
• Bullmastiffs are slightly more stubborn, influenced by their Bulldog lineage.
• Early socialization and positive reinforcement are essential for both.

Health Issues & Lifespan: What to Expect

Both dogs are quite similar in terms of their health, and considering how big they are, they can live very long and happy lives. Generally, they share the same health problems, such as hip and elbow dysplasia, gastric torsion, also known as bloat, and progressive retinal atrophy (PRA), which is the degradation of the retina leading to blindness.

Be aware that if you own a Mastiff of any kind, you should familiarize yourself with gastric torsion and its associated symptoms. If your pup displays any of these symptoms, you must get him to the vet immediately.

It would appear the only main difference in the Bullmastiff’s health compared to the English Mastiff is that they sometimes suffer from Brachycephalic syndrome. This is where they experience difficulties breathing because of the inherited English Bulldog’s flat face and snout.

The condition may need treatment with either medication or surgery, but it isn’t always an issue. On top of this, the Bullmastiff has a high pain tolerance, making it challenging to identify when something is wrong with your pup.

• Common health concerns include hip and elbow dysplasia, bloat, and PRA.
• Bullmastiffs may experience breathing issues due to their shorter snouts.
• Bullmastiffs have higher pain tolerance, making injuries harder to detect.
• Both breeds have relatively short lifespans due to their size.

Feeding & Nutrition: How Much Do They Eat?

Both the English Mastiff and the Bullmastiff eat. They eat a LOT. Expect to feed your dog anywhere from 6 cups of food daily up to 10. This is going to depend on their genetics and their size. You don’t want to underfeed either breed.

They also need similar amounts of dog food formulated specifically for Mastiffs or giant-breed dog food to meet their healthy nutrient requirements. Mastiffs will likely be on the higher end of that ratio, and Mastiffs need nutrient-dense dog food, especially when they are young.

You’ll want a giant breed-specific puppy food for both of these giants. Otherwise, they won’t get the nutrition they need as they grow.

When comparing the two breeds, the English Mastiff costs more to feed. They are generally bigger in size than a Bullmastiff, and you can expect to feed them closer to that 8 to 10-cup range per day, depending on their weight.

It’s common for some English Mastiffs to clear 200 pounds, which may even require 12 cups of food daily, depending on the formula.

Bullmastiffs eat less and cost less to feed. But they still need high-quality kibble from puppyhood to adulthood. Either way, both dogs will be expensive to feed. Expect to pay over $1,000 per year in dog food expenses for an English Mastiff and close to that for a Bullmastiff.

• English Mastiffs may require 8–12 cups of food daily, depending on weight.
• Bullmastiffs typically eat 6–8 cups per day.
• Both need giant-breed-specific dog food, especially during growth stages.
• Annual food costs can exceed $1,000 for either breed.

Grooming & Shedding: Maintenance Requirements

When it comes to grooming, both of these pups have double coats and will shed year-round. Mastiffs and Bullmastiffs experience a seasonal shedding period twice a year, known as “blow their coat,” during which they shed more than usual.

The wintertime is usually the worst, as they prepare for a thicker undercoat to protect for the elements. Bullmastiffs may seem like they shed slightly less because they aren’t quite as big. But make no mistake. You’ll be dealing with dog hair no matter which breed you pick.

Both the English Mastiff and Bullmastiff have sensitive skin. The Bullmastiff, especially in their facial area, is characterized by the way their nose forms genetically. You must be sure you dry your Bullmastiff thoroughly after any bathing. Not doing so can lead to unwanted infections.

Sensitive skin or oatmeal shampoo is best during bathing sessions. Neither breed comes out ahead, and you’ll expect monthly grooming sessions for both.

• Both breeds have short double coats and shed year-round.
• Shedding intensifies twice a year during coat-blowing seasons.
• Bullmastiffs may appear to shed less due to their smaller size.
• Both require monthly grooming and sensitive-skin shampoos.
• Thorough drying is important for Bullmastiffs to prevent skin infections.

Puppy Prices & Ownership Costs

The price of an English Mastiff starts from $1,500 from a breeder, whereas the price of a Bullmastiff starts at $1,000. You can expect to pay more for the pup, depending on their heritage and characteristics. Champion lines from either breed can fetch well over $2,000 for a purebred puppy.

Although the Bullmastiff may be slightly cheaper to buy, both dogs will be expensive to insure as they age. Keep this in mind if you intend on getting pet insurance, which we recommend. Giant breeds are more costly to insure, and the Bullmastiff can cost even more than the English Mastiff, depending on insurance carriers, due to their health concerns.

• English Mastiff puppies start at approximately $1,500 and can exceed $3,000.
• Bullmastiff puppies start around $1,000 and go up based on lineage.
• Both breeds have high ongoing costs for food, grooming, and vet care.
• Insurance premiums are typically higher due to their size and health risks.

Pros and Cons of Each Breed

When choosing between the English Mastiff and Bullmastiff, consider these breed-specific pros and cons to help you decide which fits your lifestyle best.

English Mastiff

Pros:

• Gentle, laid-back temperament: Calm, affectionate, and loyal. English Mastiffs love being close to their people and are content to relax most of the day.
• Generally good with children and strangers: With proper socialization, they tend to be more tolerant of kids and visitors compared to the Bullmastiff.

Cons:

• A very large size requires more space and higher costs: Their massive build increases costs for food, supplies, and housing needs. Not ideal for small homes or apartments.
• Heavy drooling and noticeable shedding: Known for slobber, especially after eating or drinking. Their coat sheds year-round and needs regular grooming.

Bullmastiff

Pros:

• Natural protective instincts make them excellent watchdogs: Alert and fearless, they are highly effective guardians who form strong bonds with their families.
• More manageable size and slightly lower daily maintenance: Smaller than the English Mastiff, Bullmastiffs eat less and produce slightly less shedding.

Cons:

• Stronger territorial instincts require careful supervision: They are more wary of strangers and unfamiliar animals and can become overprotective without early training.
• Independent personalities can make training more difficult. Intelligent but stubborn, Bullmastiffs require patient and consistent training to prevent behavioral challenges.

Pros and Cons Table: English Mastiff vs. Bullmastiff

Feature	English Mastiff	Bullmastiff
Temperament	Gentle, calm, laid-back; loves to lounge with family.	Protective, alert, and slightly more independent.
Family Compatibility	Typically good with kids and more accepting of strangers.	More reserved with strangers; may require closer supervision.
Size & Space Needs	Extremely large; needs ample space and strong equipment.	Large but more compact; slightly easier to accommodate.
Drooling & Shedding	Heavy drooler and consistent shedder.	Moderate drooling; appears to shed slightly less.
Guarding Instincts	Protective but generally welcoming to guests.	Strong territorial instincts; excels as a guard dog.
Training & Obedience	Stubborn but food-motivated; needs patient handling.	Even more stubborn; early and consistent training required.
Feeding Needs	High food intake (8–12 cups/day); more expensive to feed.	Lower food intake (6–8 cups/day); slightly more affordable.

8 Adoption Tips for Giant Breeds

Adopting a giant dog breed like the English Mastiff or Bullmastiff is about more than loving large dogs. These breeds require a home that can meet their physical, financial, and emotional needs. Before committing, consider the following essential tips to ensure you and your future dog are set up for success.

1. Size and Space Are Non-Negotiable

Giant dogs need more than just a big heart; they need room to move, stretch, and rest without disruption.

• Ensure your home has space for a large crate, dog bed, and clear walkways.
• Homes with narrow hallways or cluttered layouts may create stress for both you and the dog.

2. Be Prepared for Bigger Expenses

From food to medical care, large dogs come with large costs.

• High-quality food for a giant breed can cost over $1,000 annually.
• Vet care, orthopedic beds, and durable gear add to long-term costs.

3. Understand the Commitment of a Shorter Lifespan

Most giant breeds live shorter lives, typically between 6 and 10 years.

• Invest in joint supplements, preventative care, and regular vet visits to support their health.
• Prepare emotionally and financially for an earlier end-of-life stage than with smaller breeds.

4. Choose Your Breeder or Rescue Carefully

Where your dog comes from matters. A reputable source can prevent future health and behavior problems.

• Work with breeders who screen for genetic issues common in large breeds.
• For rescues, request a full medical and temperament history before adoption.

5. Daily Life Involves More Cleaning

Big dogs mean big messes. Be ready for the extra cleanup.

• Expect shedding, drooling, tracked-in mud, and the occasional mess from a swinging tail.
• Have pet-safe cleaning supplies, grooming tools, and a powerful vacuum on hand.

6. Early Training Isn’t Optional

Proper behavior in a 150-pound dog is not a luxury—it’s a necessity.

• Begin training and socialization early to ensure your dog is manageable and safe around others.
• Consider professional training or structured classes to reinforce good habits.

7. Outdoor Space Must Be Secure

Giant breeds need room to roam—but it must be safely enclosed.

• Install a sturdy fence that can withstand the strength and curiosity of a large dog.
• Bullmastiffs in particular are territorial and should never be left unsupervised in an unfenced yard.

8. Make Sure Your Lifestyle Matches Their Needs

Giant breeds thrive in calm, structured households where they can bond closely with their humans.

• If you travel frequently, have small children, or live in a chaotic environment, another breed may be a better fit.
• These dogs do best with consistent routines, moderate exercise, and lots of quality time at home.

Frequently Asked Questions (FAQ)

Still trying to decide which Mastiff is the better match for your home and lifestyle? The English Mastiff and Bullmastiff may look similar, but their differences in temperament, energy, and behavior can make one a much better fit than the other.

To help you choose with confidence, we’ve answered some of the most common questions about how these two breeds compare. If your question isn’t covered below, feel free to share it in the comments; we’re here to help.

Are Bullmastiffs more aggressive than English Mastiffs?

No, but they do have stronger guarding instincts and may be more territorial. Proper socialization and training are essential to prevent unwanted behavior. English Mastiffs are typically more relaxed and accepting of strangers.

Can either breed live in an apartment?

English Mastiffs can adapt to apartment living due to their calm nature, as long as there’s enough space. Bullmastiffs are more active and usually do better in homes with yards.

Which breed is better for families with kids?

Both can be great with children, but English Mastiffs are generally more patient and tolerant. Always supervise interactions due to the dog’s size and strength.

Do Bullmastiffs and English Mastiffs get along with other pets?

It depends on early socialization. English Mastiffs are often more accepting, while Bullmastiffs may be more dominant. Introductions should be gradual and structured.

How much do these dogs eat per day?

English Mastiffs eat 8 to 12 cups of food daily, depending on size and activity. Bullmastiffs typically require 6 to 8 cups. Both should be fed high-quality, large-breed formulas.

Which breed lives longer?

Bullmastiffs may live slightly longer (7 to 9 years) compared to English Mastiffs (6 to 10 years), but individual care, genetics, and diet play a major role.

Keep Your Giant Breed Healthy

Owning a giant breed like an English Mastiff or Bullmastiff means more than love and loyalty; it means being proactive about their health. These dogs are prone to joint issues, bloat, and weight-related conditions, so it’s essential to feed a high-quality, giant-breed-specific diet, maintain a healthy weight, and provide moderate daily exercise. Start joint support early, use orthopedic bedding, and avoid overexertion, especially in puppies.

Regular veterinary care, thoughtful grooming, and staying alert to changes in your dog’s behavior can make a meaningful difference in their health and happiness. Giant breeds may not be with us as long as their smaller counterparts, but the years they give are filled with deep affection, unwavering loyalty, and the kind of love only a dog of their stature can offer. When you provide your Mastiff with structure, comfort, and consistent care, you’re not just meeting their needs; you’re creating a life built on trust, companionship, and unconditional love. And in return, they’ll give you everything they have, every single day.

Which Mastiff Has Your Heart?

We’d love to hear from you! Do you have a soft spot for the laid-back English Mastiff, or do you admire the loyalty and strength of the Bullmastiff? Share your thoughts in the comments, whether you’ve owned one, met one, or are dreaming about bringing one home.