The Complete English mastiff Guide

You didn’t land on the English mastiff by accident. This is a breed people seek out, and for good reason. The largest dog by mass, calm and devoted, and a gentle giant with ancient guardian heritage, they’re a natural fit for experienced large-dog owners with space and budget who want the ultimate gentle giant who want a massive, calm, and devoted guardian who brings a powerful presence and gentle warmth to a prepared household. Let’s dig in.

What are the characteristics of a English mastiff?

Think you know what you’re getting into with a English mastiff? These scores will either confirm your suspicions or give you something to think about. Either way, good to know now.

Training

Trait	Score	What does it mean?
Trainability	3 out of 5	Intelligent and capable of learning. Their size demands early training. An unruly puppy becomes an unruly 200-pound dog
Obedience	3 out of 5	Responds to consistent, positive direction. Not a difficult breed, but their size amplifies everything
Focus	3 out of 5	Generally attentive, though their calm nature can look like indifference
Stubbornness	2 out of 5	Rarely stubborn. Their easy-going nature makes them cooperative

Friendliness

Trait	Score	What does it mean?
Good with family	5 out of 5	Devoted to their family above all else
Good with children	4 out of 5	Gentle and patient with children. Their size is the primary hazard, not their temperament
Good with strangers	3 out of 5	Calm with familiar visitors. Reserved with strangers. Socialization is important
Good with other dogs	3 out of 5	Generally tolerates other dogs

Adaptability

Trait	Score	What does it mean?
Apartment living	1 out of 5	Not suited to apartment living under any circumstances
Cold weather	3 out of 5	Handles cool weather reasonably well
Hot weather	3 out of 5	Moderate heat tolerance. Avoid heavy exercise in high temperatures
Routine flexibility	3 out of 5	Adapts when exercise and social needs are met
First time owner	2 out of 5	Better suited to large-dog experienced owners

Physical needs

Trait	Score	What does it mean?
Energy level	2 out of 5	Low to moderate energy for their size
Endurance	2 out of 5	Not built for sustained athletic effort
Exercise needs	3 out of 5	Needs 20 to 30 minutes of moderate daily exercise. Short walks and outdoor access
Mental stimulation	2 out of 5	Intelligent but not demanding of intense mental stimulation
Grooming needs	2 out of 5	Short, dense coat that requires minimal grooming

Personality

Trait	Score	What does it mean?
Playfulness	3 out of 5	Playful in a slow, gentle way
Affection	5 out of 5	Devoted, warm, and physically close with their family
Loyalty	4 out of 5	Deeply loyal. Their protective nature and family bond are defining traits
Independence	3 out of 5	Self-sufficient and calm. Can handle alone time better than some breeds
Alertness	4 out of 5	Alert and watchful. Their presence alone is a deterrent

Behavior

Trait	Score	What does it mean?
Barking tendency	2 out of 5	Not prone to barking. Their bark is deep and infrequent
Digging tendency	1 out of 5	Not prone to digging
Chewing tendency	2 out of 5	Low chewing in adults. Their jaw strength makes puppy chewing significant
Prey drive	2 out of 5	Low prey drive
Guarding instincts	5 out of 5	Their size alone makes them one of the most effective deterrents

What are common health issues of a English mastiff?

Like all breeds, English mastiffs are prone to certain health conditions. Here’s what to keep on your radar.

What are the recommended health tests for English mastiffs? 

Your English mastiff can’t tell you when something’s off. That’s what these tests are for. Here’s what vets typically recommend for them.

• OFA hip evaluation
• OFA elbow evaluation
• Cardiac evaluation by a board-certified cardiologist
• CAER ophthalmologist eye exam

Do English mastiffs need pet insurance?

We’ll let the numbers do the talking, but spoiler: a lot of English mastiff owners are really glad they had coverage.

Those numbers aren’t hypotheticals. They’re real claims from real English mastiff owners in 2025.

The right pet insurance means you’re making decisions based on what your dog needs, not what you can afford.

With Lemonade, you can build a plan around your Mastiff specifically. Start with accident and illness coverage as your base, then add on what makes sense for your dog, things like physical therapy, dental illness, or behavioral treatment, and skip what doesn’t. Coverage applies to conditions that aren’t pre-existing (AKA, a condition that occurs after your policy is active and your waiting periods have passed), and you’ll know exactly what’s included before you commit. No fine print ambushes, no surprises at claim time.

And when you do need to file? You can do it in the app in minutes. No paperwork, no hold music, no waiting around.

English mastiffs are worth protecting with proper coverage. Here’s how to do it right.

How much does pet insurance cost?

The cost of your premium is personal. It depends on your Mastiffs age, your location, and what you add to your plan. That said, here’s a realistic look at what other English mastiff owners pay with Lemonade:

Age	Average monthly premium
1 year old	$55-$60
2 years old	$65-$70
3 years old	$60-$65
4 years old	$65-$70
5 years old	$70-$75
6 years old	$90-$95
7 years old	$100-$105

Not sure if Lemonade is the right fit for your Mastiff?

See how we stack up. Compare pet insurance options side by side and find the coverage that fits your English mastiff and your budget.

History of the English mastiff

The English Mastiff, or simply the Mastiff, is one of the oldest and largest breeds in the world. Mastiff-type dogs were documented in ancient Babylonian carvings, Egyptian friezes, and Chinese documents, and the Romans used massive war dogs in battle that match the Mastiff type. In Britain, Mastiffs were used in bear-baiting and lion-baiting and served as estate guard dogs throughout medieval and Renaissance periods. The breed was nearly wiped out twice, once after bear and bull-baiting were banned in England in 1835 and again during both World Wars when food shortages made feeding giant dogs untenable. American Mastiff imports from Canadian lines helped revive the British breed after World War II. The AKC recognized the Mastiff in 1885. Despite their guardian heritage, modern Mastiffs are primarily known for their gentle nature with family members.

Caring for a English mastiff

Training

Training a English mastiff is straightforward, but it’s worth the effort. They are gentle, willing to please, and moderately motivated by treats and affection, which means training is usually smooth when sessions are kept calm, consistent, and reward-based. Positive reinforcement with treats and calm, consistent expectations given their massive size tends to work best, and getting started early makes a real difference.

Whether you’re starting from scratch or leveling up, these are worth the read.

Grooming

English mastiffs have a short, dense coat that requires minimal grooming. Weekly brushing with a rubber curry comb or soft bristle brush is all the coat needs, and the occasional wipe-down keeps them looking their best. Facial wrinkles require regular cleaning to prevent moisture buildup and skin irritation.

From nail trims to professional care, here’s everything you need to keep your Mastiff looking (and feeling) their best.

Exercise and mental stimulation

English mastiffs have moderate energy levels and need 45 to 60 minutes of exercise each day to stay happy and healthy. Leisurely walks, gentle fetch, and short outdoor exploration are all great ways to burn through that energy. But physical exercise is only half the picture. English mastiffs are moderately intelligent dogs, and mental stimulation is just as important as the miles you put in. Without it, they become restless and destructive given their enormous size despite their generally calm demeanor. Puzzle toys, training sessions, and scent work are all solid ways to keep their brain engaged between walks.

Here’s how to build an exercise routine your English mastiff will actually love.

Nutrition

English mastiffs are giant dogs with moderate energy, so they need a diet to match. Most adults do well on around 2,500 to 3,200 calories a day, spread across two meals. Depending on what you’re feeding them, expect to spend around $100 to $150 a month on food. Not the cheapest line item, but not the most expensive either.

What goes in the bowl is your call, and your vet’s. Kibble, raw, fresh, or a combination: there’s no single right answer. Focus on quality ingredients, the right portions for your dog’s age and activity level, and you’re most of the way there.

Get the full picture on feeding a English mastiff here.

English mastiff costs and adoption

What does it cost to bring home a English mastiff?

Before your English mastiff even sets a paw in your home, there are some one-time costs worth planning for. Here’s what to expect upfront.

Category	Cost Range	Details
Adoption (Reputable breeder)	$1,500-$4,500	Health testing, vaccinations, early socialization, pedigree
Adoption (Rescue/shelter)	$50-$300	Basic veterinary care, spay/neuter, temperament evaluation
Initial veterinary care	$300-$700	Exam, vaccinations, spay/neuter if needed, microchip
Essential supplies	$200-$500	Crate, bed, leash, collar, food bowls, toys
Training classes	$150-$300	Basic obedience, puppy socialization

Unexpected costs have a way of showing up in year one more than any other. A starter emergency fund alongside a solid pet insurance plan is the best way to make sure they don’t catch you off guard.

What does it cost to own a English mastiff each year?

Once you’re past year one, ownership costs settle into a more predictable rhythm. Here’s what most English mastiff owners spend annually, though keep in mind these numbers can vary quite a bit depending on where you live, your dog’s individual health needs, and the choices you make along the way.

Category	Annual cost	Details
Food and treats	$1,400-$2,400	Based on the recommended portion for your English mastiff
Routine Veterinary Care	$500-$1,000	Wellness exams, vaccinations, dental care
Professional Grooming	$100-$300	Every Every 6 to 8 weeks, Short coat sheds moderately; weekly brushing reduces loose hair.
Toys and Supplies	$200-$400	Replacement items, mental stimulation toys

What are popular English mastiff names?

We’ve crunched the numbers, and found the top 10 most popular names for English mastiff we see at Lemonade.

More names where those came from. If none of these are clicking, we’ve done the digging for you. Go find the one that sticks.

English mastiff puppies

Puppy veterinary needs

The first year matters a lot. What happens between 8 weeks and 12 months shapes who this dog becomes. Here’s what to focus on.

The first few months are the most important window for your puppy’s health. Core vaccines start at 6–8 weeks and continue through 16 weeks. After that, its annual boosters and routine screening as they grow into adults.

It’s a lot to keep track of. That’s why we made it easy.

Puppy socialization

English mastiff puppies are calm, devoted, and impossibly large in the gentlest way possible. That a protective presence and family devotion that is profound despite the gentle exterior is part of what makes them the ultimate gentle giant for households with the space, budget, and commitment giant-breed ownership demands, and it’s also why early socialization matters so much.

Between 8 and 16 weeks, get them in front of as much variety as possible. Different people, animals, sounds, surfaces, and locations. Keep every experience positive. Puppy classes are great for this: supervised, controlled, and full of exactly the kind of novelty a English mastiff brain needs to learn that the world is mostly fine.

Where are English mastiff’s most popular in the United States?

Based on Lemonade’s own policyholder data, English mastiffs are most popular in these five states. We’ve also thrown in a few things local pet owners should keep an eye on, so your pup can get out there and explore safely.

1. California

Foxtail grass is one of the sneakiest hazards for California dogs. The barbed seeds can embed in paws, ears, and noses from late spring through early fall, so check your dog after any outdoor time. Wildfire smoke is also a real seasonal concern; when air quality alerts are in effect, it's best to keep walks short and stay indoors as much as possible.

2. Illinois

Chicago winters bring salted sidewalks that can irritate and crack paw pads, so wiping down your dog's paws after walks is a good habit from November through March. In warmer months, ticks become active in wooded and grassy areas, and the occasional coyote sighting in suburban neighborhoods is worth keeping in mind.

3. Texas

Texas heat is intense and sets in early. Hot pavement can burn paws from late spring through early fall, and heatstroke risk is high during midday walks in cities like Houston, Dallas, and San Antonio. Rattlesnakes, scorpions, and fire ants are also common hazards, particularly in suburban and rural areas.

4. Pennsylvania

Pennsylvania is one of the highest-risk states for Lyme disease in the US, with ticks active across the state's forests, parks, and suburban green spaces. Copperhead snakes are also found in wooded and rocky areas, particularly in the central and eastern parts of the state, so watching where your dog explores is worth the habit.

5. Ohio

Ohio's mix of farmland, suburbs, and wooded parks creates consistent tick and flea exposure, particularly in spring and summer. Coyotes are also well-established across the state, including in suburban areas, so being aware of surroundings during dusk and dawn walks is a good habit.

Breed comparison

Already leaning toward a English mastiff? These breeds often get compared, here’s a quick snapshot of how they stack up.

Is a English mastiff right for you?

English mastiffs reward the right owner with a calm, protective presence that makes a household feel genuinely secure and a devotion so steady and deep it becomes one of the defining features of your life. They just need space for a very large dog, budget for giant-breed food and medical costs, and early consistent training in return. If you’re ready for that, you’re ready for a English mastiff. Make sure they’re protected from day one.

A few quick words, because we <3 our lawyers: This post is general in nature, and any statement in it doesn’t alter the terms, conditions, exclusions, or limitations of the policies issued, which differ according to your state of residence. You’re encouraged to discuss your specific circumstances with your own professional advisors. The purpose of this post is merely to provide you with info and insights you can use to make such discussions more productive! Naturally, all comments by, or references to, third parties represent their own views, and Lemonade assumes no responsibility for them. Coverage may not be available in all states. Please note that statements about coverages, policy management, claims processes, Giveback, and customer support apply to policies underwritten by Lemonade Insurance Company or Metromile Insurance Company, a Lemonade company, sold by Lemonade Insurance Agency, LLC. The statements do not apply to policies underwritten by other carriers.

Insurance claim data is based on Lemonade pet insurance claims that were settled and paid in 2025.
Average insurance premium data is based on Lemonade’s internal data and reflects the average premium over the last 12 complete months, accurate as of June 2026.
Top pet names are sourced from Lemonade’s database of pet names associated with submitted quotes and purchased policies.
Top states for each breed are based on the number of active Lemonade pet insurance policies for that breed in each state as of June 2026.