100-130 lbs
United States
The Masti-Bull is a hybrid dog. His parent breeds are the Mastiff and the  American Bulldog. The Masti-Bull is considered a giant-sized dog. He is a dog that does not require much in the way of maintenance, but his great size makes him more suitable for a family home, especially with a fenced-in yard. He may be somewhat difficult to train, so the Masti-Bull is not recommended for novice dog owners. He is good with children, however. He is playful and energetic. He will enjoy spending time with you as an active member of your family, or while stretched out on the couch beside you lounging.
purpose Purpose
Companion, Guarding
history Date of Origin
ancestry Ancestry
Mastiff, American Bulldog

Masti-Bull Health

Average Size
Male Masti-Bull size stats
Height: 30-36 inches Weight: 125-150 lbs
Female Masti-Bull size stats
Height: 28-32 inches Weight: 100-130 lbs
Major Concerns
  • Cataracts
  • Canine Hip Dysplasia
  • Hypothyroidism
  • Progressive Retinal Atrophy (PRA)
  • Gastric Dilation Volvulus (GDV) or Bloat
Minor Concerns
  • Demodectic Mange
  • Seizures
Occasional Diagnoses
  • None
Occasional Tests
  • Hip And Eyes

Masti-Bull Breed History

While there is not a great deal of information about the Masti-Bull, we can study the parent breeds to understand the history of the hybrid breed. The Mastiff is an ancient breed whose exact origin is not known. He is believed to be related to the Tibetan Mastiff, Saint Bernard, Rottweiler, and Dogue de Bordeaux. A Mastiff-like dog is depicted on Egyptian, Babylonian, and Greek artwork. The Mastiff worked as a guard dog and also took part in many battles of war. Unfortunately, people also pitted them against bears and lions as a form of entertainment. The modern Mastiff was developed in England. He was used to guard estates, and a particular line of Mastiffs, responsible for guarding Lyme Hall helped to save the breed from extinction. The Mastiff almost died out after World War II, when food shortages made it difficult to feed the massive dog. The first Mastiff was recognized by the American Kennel Club in 1885. The American Bulldog is a descendant of the Old English Bulldog. He was brought to North America by working class immigrants who wanted to maintain the same type of dogs they had had in their home country. Owners bred them with other working dogs to maintain certain traits, such as herding and guarding. The dog is agile and intelligent, and, most of all, loyal. The American Bulldog is a natural hunter, particularly wild hogs. American Bulldogs have also been used for bull-baiting, hence the name. Like the Mastiff, the American Bulldog was almost to the point of extinction at the end of World War II. However, breeders looked all over the American South to find dogs available for breeding, and the American Bulldog was revived.

Masti-Bull Breed Appearance

The Masti-Bull is a giant-sized dog. He will be a variety of colors based on the dominant parent breed. He may be brown, black, brindle, white with brindle markings, white with black or brown markings. He may also be a light tan or cream color. Some Mastiffs have black markings on the muzzle and ears; the Masti-Bull may inherit these traits. He may also have a white marking on his chest. He may be brachycephalic - short-nosed - a trait he will inherit from the American Bulldog parent breed. He will have a large, broad head with ears that may be somewhat floppy. His tail will be long and straight. His body is sleek and muscular. His legs and also long and strong.
Eye Color Possibilities
hazel Masti-Bull eyes
brown Masti-Bull eyes
Nose Color Possibilities
black Masti-Bull nose
brown Masti-Bull nose
Coat Color Possibilities
black Masti-Bull coat
brown Masti-Bull coat
cream Masti-Bull coat
fawn Masti-Bull coat
white Masti-Bull coat
pied Masti-Bull coat
Coat Length
Short Medium Long
Coat Density
coat density
Sparse Normal Dense
Coat Texture
coat texture
Masti-Bull straight coat texture
Straight Wiry Wavy Curly Corded

Masti-Bull Breed Maintenance

The Masti-Bull will require little in the way of maintenance. However, he is a large dog, and he will need plenty of room to stretch out. Brush him once a month with a rubber hound glove to remove any dead hair and dander from his coat. You may want to increase this to daily brushing in the spring and fall when he is prone to shedding. Should your Masti-Bull inherit the Mastiff wrinkles, you will need to clean his wrinkles regularly to prevent bacterial infections. In the summer months, you will want to do this daily. Brush his teeth two or three times a week to prevent tartar build-up and bad breath. However, to prevent tooth decay, brush his teeth daily. Check his ears at least once a week for redness or a bad odor, which can indicate an infection. Use a cotton ball dampened with warm water to wipe out your Masti-Bull's ears weekly. Trim his nails at least once every two weeks. A good guideline is if you can hear your dog's nails clicking on the tile floor, it is time to cut the nails.
Brushes for Masti-Bull
Pin Brush
Pin Brush
Nail Clipper
Nail Clipper
Brushing Frequency
fur daily fur weekly fur monthly
Masti-Bull requires monthly brushing
Daily Weekly Monthly

Masti-Bull Temperament

The Masti-Bull is a gentle giant. He is somewhat leery of strangers, but he is not overly aggressive toward them. However, if he feels that he or his family is threatened, he will step in. Be aware that he does not like conflict, even if it is within his family. He may step between two adults arguing. This is due to his high level of sensitivity. He may also be somewhat shy and timid, although proper early socialization will help prevent these traits. He is by nature a hunter, and he loves to play fetch. Don't be surprised if he brings you a fallen limb for fetch, either. He is very protective of children and is highly affectionate with them. The only time he should ever be aggressive is if he perceives danger to his family.

Masti-Bull Activity Requirements

The Masti-Bull is a fairly active dog. He is a hunter and a working dog at heart, so plan for games in which he works those skills. As previously stated, he does love a game of fetch, so take him outdoors and find an appropriate toy for the game. He does enjoy chewing, so keep that in mind as you train him. Keeping toys that he is allowed to chew will keep him from destroying shoes and furniture. He enjoys the outdoors, so if you are outside, allow him to accompany you when permissible. He will also enjoy trips to the dog park. It is important to remember that both parent breeds are prone to overheating or overexertion. This means that the Masti-Bull needs extra care when exercising as well. Never allow him to get too hot or too excited, and keep water nearby during exercise.
Activity Level
low activity medium activity high activity
Low Medium High
Rec. Walk Mileage Per Week
8 miles
walk mileage
Minutes of Activity Per Day
45 minutes
activity minutes

Masti-Bull Food Consumption

Cups Per Day
3 cups
cup per day cost cup per day cost cup per day cost
Daily Cost
$2.70 - $3.00
food bowls daily cost
Monthly Cost
$80.00 - $90.00
food bag monthly cost

Masti-Bull Height & Weight

6 Months
Male Masti-Bull size stats at six months
Height: 21.0 inches Weight: 55.0 lbs
Female Masti-Bull size stats at six months
Height: 21.0 inches Weight: 47.5 lbs
12 Months
Male Masti-Bull size stats at 12 months
Height: 23.0 inches Weight: 90.0 lbs
Female Masti-Bull size stats at 12 months
Height: 23.0 inches Weight: 77.5 lbs
18 Months
Male Masti-Bull size stats at 18 months
Height: 30.0 inches Weight: 100.0 lbs
Female Masti-Bull size stats at 18 months
Height: 27.0 inches Weight: 95.0 lbs

Masti-Bull Owner Experiences

4 Months
4 People
House & Yard
She is everything in your description and more vary loving and loyal to me she is an over sized lap dog and vary smart she can already sit shake hands and your high five on my demand and I love her very much
2 years, 1 month ago
12 Months
3 People
House & Yard
I am an experienced owned of large dog breeds, but this one beats all the rest. His so loyal, and funny, very clumsy but also very clever. Very quick to learn new training. Great with kids and other dogs. Only down side I can think of is his farts stink! And his nervous of strangers. Also be prepared for the looks you get, people instantly fall in love with him, or throw him looks of pure hate!
2 years, 9 months ago
3 Years
4 People
House & Yard
Running across the beaches
Runnin across the sandy shores with him
He's the most lOving dog in the world.
5 years ago
3 Years
3 People
House & Yard
she likes to play
She was a stray for 2 years of her life. She likes to dig deep holes which she gets into trouble. She is very affectionate dog likes to cuddle. I call her Miss Piggy. she will eat my other dog's bones and sometimes his food. She is a beast compare to my other dog-solid muscle but she is cute. She likes to stay outside even when it rains. We have her for almost a year in April we rescued her from the animal shelter.
4 years, 3 months ago
5 Years
2 People
We have experienced with staffies blue nose.
3 years, 6 months ago
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