English Mastweiler

100-140 lbs
25-30"
Unknown
Mastiff
Rottweiler
Mastweiler

The English Mastweiler is a designer dog, a deliberate crossbreed between two large, muscular dogs designed to guard people and property, the English Mastiff and the Rottweiler. These dogs are family oriented and are naturally protective, but they are very powerful animals and interactions with smaller children and animals should be closely supervised to prevent unintentional injuries as well as aggression. This hybrid will take extra care during development to encourage good health and development, including early and thorough socialization, properly formulated food for large growing dogs, and extra caution during activities that include rough-housing, running, or jumping. This dog should not be confused with the Bull Mastweiler, a cross between the Bullmastiff and the Rottweiler, which is typically a smaller and more intense hybrid than the English Mastweiler.

purpose Purpose
Guard dog, Family companion
history Date of Origin
Unknown
ancestry Ancestry
English Mastiff, Rottweiler

English Mastweiler Health

Average Size
Male English Mastweiler size stats
Height: 27-32 inches Weight: 120-160 lbs
Female English Mastweiler size stats
Height: 25-30 inches Weight: 100-140 lbs
Major Concerns
  • Osteosarcoma
  • Hip And Elbow Dysplasia
  • Bloat
  • Stenosis
Minor Concerns
  • Hypothyroidism
  • Obesity
  • Eye disorders and disease
Occasional Diagnoses
  • Wobbler Syndrome
  • X-linked Muscular Dystrophy
  • Osteosarcoma
Occasional Tests
  • Eye Examination
  • Biopsy
  • X-ray imaging
  • Electrocardiogram

English Mastweiler Breed History

The English Mastweiler is a large crossbreed, a deliberate mix between two breeds of imposing and dedicated guard dogs, the English Mastiff and the Rottweiler. Mastiff-like dogs have been depicted in ancient Asian artwork as far back as 2500 BC and they were recorded as travelling across the Alps with Hannibal and his armies.  When Mastiff dogs were introduced to England they quickly became quite popular, a consummate guard dog and hunting companion that was favored by landholders and peasants alike. World Wars I and II had a negative impact on Europe’s canine population, particularly on larger sized dogs like the Mastiffs who were both useful on the front lines, and difficult to keep fed. By the time both of the wars had ended the English Mastiff was nearly extinct, at one point down to just fifteen dogs known dogs worldwide that were able to contribute to the gene pool. Mastiff puppies were imported to England from scant populations in both the United States and Canada to help revive the breed. The Rottweiler is an ancient German breed, a breed that is old enough that their full origins are obscured by history, although it is believed by most that they were the descendants of large Roman dogs that drove cattle for the cattlemen and butchers, known as drover dogs, sometime prior to 700 A.D. They were named for the area that they were developed in, a site known as Rottweil for the abundance of red, Roman tiles that were unearthed there. Although their popularity declined during the industrial revolution in the 1800’s, it was rekindled in the 1900’s when they were often employed as police or military animals.

English Mastweiler Breed Appearance

This crossbreed produces very large canines that are solidly built and well-muscled. They have a nearly square appearance, although the dogs are usually slightly longer than they are tall, and broad, flat heads. They have dark brown eyes that are either round or almond shaped, with an alert and dignified expression and their ears are V-shaped or triangular, sit high on the head, and fold down either to the front of the face or to the sides of the head. English Mastweilers sport short, dense coats with a thick undercoat and may take their coloration from either side of the family. This hybrid may favor the traditional English Mastiff colors of red, fawn, or brindle, as well as mixes of these colors, or they may lean towards the Rottweiler side of the equation and have black & rust, black & mahogany, or black & tan coloration. Black, white, or brindle markings and dark masks are also common for this crossbreed.

Eye Color Possibilities
brown English Mastweiler eyes
Brown
Nose Color Possibilities
black English Mastweiler nose
Black
Coat Color Possibilities
black English Mastweiler coat
Black
brindle English Mastweiler coat
Brindle
fawn English Mastweiler coat
Fawn
Coat Length
coat
Short Medium Long
Coat Density
coat density
pin
Sparse Normal Dense
Coat Texture
coat texture
English Mastweiler straight coat texture
Straight Wiry Wavy Curly Corded

English Mastweiler Breed Maintenance

These dogs have fairly simple grooming requirements as this hybrid’s short coat is quite manageable. Although they require regular brushing with a curry comb or soft bristle brush to control the shedding and distribute their body oils, a bath every month or two is typically adequate for these dogs. If your dog has inherited the folds or wrinkles commonly seen on English Mastiffs, care should be taken on a regular basis to ensure that the folds of skin have not trapped any moisture or contaminants as these can cause skin irritation and a foul odor may develop. Any wrinkles around the face should be wiped down on at least a daily basis in order to remove any moisture or food particles that may have become trapped.
Brushes for English Mastweiler
Pin Brush
Pin Brush
Comb
Comb
Nail Clipper
Nail Clipper
Brushing Frequency
fur daily fur weekly fur monthly
English Mastweiler requires daily brushing
Daily Weekly Monthly

English Mastweiler Temperament

Both of the parent breeds are consummate guard dogs that, while they can be clownish on occasion, tend to have a strong and dignified air about them. The Rottweiler is a very active animal that requires a great deal of exercise, but the Mastiff is a much more sedate canine who is more likely to tend towards laziness as they age. Both breeds are good with children as well, and the addition of the English Mastiff to the mix may encourage slightly less boisterous activity than some dogs of this size, particularly after they mature. English Mastweilers will be happiest if they are a part of the family; however, these dogs are very powerful, and all time spent with toddlers and younger children should be supervised. This breed is generally less boisterous than most canines their size, due to the contribution of the English Mastiff, and they tend to be laid-back, easy going, and loving towards children. Early and frequent socialization should help to curb suspicious behaviors towards strangers and to prevent overprotective aggression from developing. 

English Mastweiler Activity Requirements

Although the Mastiff is a rather laid-back breed that typically requires less exercise than other large dogs the Rottweiler is an active breed, so at least 40 to 60 minutes of vigorous activity a day will be needed to keep this hybrid in top condition. Along with daily walks, these dogs are adept at drafting and carting activities, tracking, and obedience training. During your dog’s formative years it is important to keep exercise sessions somewhat shorter by breaking them up throughout the day, and ensure that your dog does not rough-house or jump from a significant height as this can damage the still forming bones and joints. This crossbreed prefers the room that a larger house provides, but as they are not given to barking unnecessarily they may be able to adapt to apartment life if given a great deal of extra exercise in several short sessions throughout the day. Slippery surfaces should be avoided, however, in order to avoid joint and ligament damage.  

Activity Level
low activity medium activity high activity
Low Medium High
Rec. Walk Mileage Per Week
9 miles
walk mileage
Minutes of Activity Per Day
40 minutes
activity minutes

English Mastweiler Food Consumption

Cups Per Day
3 cups
cup per day cost cup per day cost cup per day cost
Daily Cost
$2.75 - $3.00
food bowls daily cost
Monthly Cost
$80.00 - $90.00
food bag monthly cost

English Mastweiler Owner Experiences

Kimber
11 Months
3 People
Condo
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
Meeting any stranger she walks by
Chewing , tuggy, any toy, any bone, eating
Great dog, very loving, if someone breaks in they may get licked to death
4 weeks ago
Odin
3 Years
2 People
Condo
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
Tug-of-war
Walk
Fetch
We got Odin as a rescue at age 2.5 and he had been completely neglected so a lot of the required socialization he should have experienced did not occur. Because of this, he had some real issues with fear/protective aggression. Luckily he trusted my boyfriend and I right off the bat (which the lady we got him from said was different for him and a great sign), but everyone else he encountered he would bark and growl at intensely. Despite this he was never actually violent and never bit anyone ever. He is super protective and cuddly as all heck with us and SUPER high energy. We go for 2 40 minute walks a day to tucker him out but even then sometimes it’s not enough!! Every single sound he hears he bolts to the window and barks but we have been training and socializing him and slowly but surely he is getting better with this. He is very smart and easily trainable.
1 month, 1 week ago
PATCH
8 Weeks
3 People
House
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
Just got her from my boss she got scratched on the the eye but it seems to be healing, she is a good dog and i love her companionship
1 month, 3 weeks ago
Dollar
3 Years
4 People
House & Yard
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
There is 2x Adults and 2x kids age 42,42,22,15 and we also have 2x pugs and 2x Electus birds even though dollar is massive in comparison to the pugs he thinks he is a pug lol but only with the family he is very playful and loving however if someone comes into the yard he doesn’t know them you see a hole new side of him he loves to go swimming with our younger son and dirt bike riding with our older son he is very powerful but well behaved he was very easy to train getting sit stay down hugs hi fives shake and so on very quickly he also was simple to toilet train I would recommend this bread to someone that has time to spend with them or a family that will all work together keeping them busy they also love toys and car rides this bread of dog will give unconditional love and would stop at nothing to protect the ones he loves and his home Childish yet knows what his job is and will do it well
1 month, 3 weeks ago
Havana
2 Years
2 People
House & Yard
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
chewing
Tug-of-war
Nap
swimming
Giving kisses
Cuddling
My sweet girl Havana is the current picture of the English mastweiler page on Wag but she is much bigger now. She will be 2 in September. She is the sweetest, goofiest girl. She loves cuddles, kisses, swimming, and chewing on bones. She is super clumsy and loves all people and kids. She gets along super well with our other dog and our cat but she isn't too fond of yappy dogs. She is a great car passenger and her favorite spot at home is on the back of the couch with her arm propped up, looking out the window at the neighborhood (her cat perch). We love our good girl.
2 years, 3 months ago
Miles
Ten Years
2 People
House & Yard
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
Walking, swimming
Hiking, walking,relaxing
Miles when younger was very athletic,could run and jump like a deer.. incredibly powerful dog, great watchdog,loved people.. I've owned five Rottweilers many yrs ago. Miles was a wonderful mix of Rottie and Mastiff.. He was a beautiful red color, weighted 166 lbs, not the slightest bit over weight, extremely heavy boned, huge well defined head.. simply gorgeous..we had to put him down 3 wks,his legs gave out on him, despite meds and supplements.. Miss him terribly, wish I could find another him,best dog ever..
1 year, 9 months ago
Reece
10 Weeks
3 People
House & Yard
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
Fetch
Cuddling
Walk
Sleeping
Hike
Tug-of-war
Play
My English Mastweiler is a male, who is 10 weeks old. He is extremely playful, yet loves to lay down and cuddle when he is done playing. He keeps an eye out at all times, but loves meeting new people, and is especially keen towards my 2 1/2 year old son.
11 months ago
Daisy
3 Years
3 People
House
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
Walking
She is very laid back and doesn’t know a stranger. She is very big and appears intimidating. I have a feeling if someone broke in the house she would wag her tail and belly up for tummy rubs. Also, very vocal. Not barking or whining, but makes grunting noises like she is telling you something.
8 months ago
Amber
16 Weeks
5 People
House & Yard
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
Fetch
Napping
Hiking
eating sticks
Being read to
Dog Parks
Tug-of-war
Since we’ve gotten her she’s all about hanging out with the family and being apart of all our every day activities. She always expects people to pet her even if she hasn’t met them yet!! She very curious and cuddly. She loves all toys and is super trainable. Overall, super good dog that loves the outdoors but can also lay around for hours (be prepared for snoring and lots of farts)
8 months ago
Rocky
4 Months
1 People
Apartment
Health
Grooming
Friendliness
Energy
Trainability
Pastimes
I would recommend this breed to any one that wants a big, lazy-ish, guard dog. Of course temperaments vary but so far Rocky is very affectionate and playful but also enjoys spending a majority of the day laying around and playing with my cat. He is not always in the mood to get trained but when he does good.
6 months, 3 weeks ago
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