Bull Jack

17-50 lbs
United States
Jack Russell Terrier

The Bull Jack is a mix between the English Bulldog and the Jack Russell.  It is thought that this feisty hybrid was developed in the United States within the past 20 years.  The Bull Jack will have characteristics of both his parents, proving to be affectionate and lively.  He is a sturdy small to medium size dog with a short coat. The Bull Jack is a low maintenance dog in the grooming department, and  they do well in most environments but not in extreme heat or cold temperatures. The Bull Jack can happily live in an apartment if he receives daily walks and outings that involve fun activities.  If you are looking for a fun and loving companion, the Bull Jack is just the dog you need.

purpose Purpose
history Date of Origin
ancestry Ancestry
Bulldog, Jack Russell

Bull Jack Health

Average Size
Male Bull Jack size stats
Height: 12-14 inches Weight: 17-55 lbs
Female Bull Jack size stats
Height: 12-14 inches Weight: 17-50 lbs
Major Concerns
  • Patellar Luxation
  • Glaucoma
  • Hip Dysplasia
  • Hemolytic Anemia
Minor Concerns
  • Cherry Eye
  • Epilepsy
  • Heart Murmur
  • Atopy
  • Mass Cell Tumor
Occasional Diagnoses
  • Deafness
  • Skin Infections
  • Gingivitis
Occasional Tests
  • X-Rays
  • Eye Examination
  • Electrocardiogram
  • Complete Blood Count
  • Skin Biopsy
  • Allergy Testing

Bull Jack Breed History

Thought to be a cross of the Mastiff and the Pug, the English Bulldog breed was developed in England during the 19th century. The first English Bulldogs were larger than they are today; they weighed about 80 pounds.  He was bred to be aggressive, courageous and determined.   The original purpose of the breed was bull-baiting. Bull baiting was officially outlawed in England by the Humane Act of 1835. When bull-baiting was outlawed, dog fighting became more popular.  Dog fighting required a smaller area than a bull-baiting roped-off ring. So, even though dog fighting was also illegal it was easier to conceal from the authorities. Eventually bred to be a gentler companion, the breed was allowed to lead a happier life. The English Bulldog was officially recognized by the American Kennel Club in 1886.  The English Bulldog is the official mascot for many high schools, universities, sport teams and the United States Marines. Celebrities such as: Pink, Adam Sandler, Olivia Wilde, John Legend, Reese Witherspoon and Willow Smith are proud owners of the English Bulldog. The Jack Russell Terrier was developed in England in the 1800’s. In 1819, a student by the name of John Russell purchased a small white and tan Terrier from a local milkman.  He named the adorable dog Trump. The dog had the appearance of a Wire Fox Terrier but had smaller legs. Mr. Russell was an avid hunter and started breeding Trump.  His goal was to develop a Terrier with high stamina and courage who would eagerly chase out a fox from his den. By the 1850’s Trump’s offspring were recognized as a breed. The Fox Terrier and the Jack Russell of today are descendants of Trump. The Fox Terrier Club was formed in 1875 and Mr. Russell was one of the founding members. In 1982, a Jack Russell named Bothy was part of the Transglobe Expedition. He became the first dog to travel to both the North and South poles with his owner Ranulph Fiennes and Charles Burton. 

Bull Jack Breed Appearance

The Bull Jack will have physical characteristics of both of his parents.  He may take more after the Bulldog or the Jack Russell. The Bull Jack will have a smooth short coat, which can be black, white, tan or a brown combination. He will be short with an average height of 12 to 14 inches. The Bull Jack will be a strong and muscular medium size dog.  He may have some wrinkles and folds in his skin. His eyes have a loving and intelligent expression and his appearance will be of an alert and confident dog.. The ears will be small pendant ears. The eyes and nose will be dark in color. 

Eye Color Possibilities
brown Bull Jack eyes
Nose Color Possibilities
black Bull Jack nose
Coat Color Possibilities
brown Bull Jack coat
white Bull Jack coat
black Bull Jack coat
Coat Length
Short Medium Long
Coat Density
coat density
Sparse Normal Dense
Coat Texture
coat texture
Bull Jack wiry coat texture
Straight Wiry Wavy Curly Corded

Bull Jack Breed Maintenance

The Bull Jack has a short smooth coat, which only requires combing or brushing once a week to remove loose hair. Bathing can be done monthly with a gentle canine shampoo. If he has wrinkles or folds in his skin they must be kept clean and dry. His ears will need weekly ear cleaning if he tends to have a buildup of dirt or moisture within. To prevent tartar accumulation, his teeth should be brushed with a dog toothpaste twice a week. Nails should be trimmed monthly but checked more often for cracks or breaks in the nail. It is a good idea to have your dog micro-chipped; if he ever heads off on an unplanned expedition, he can be scanned by a shelter or veterinarian’s office and traced back to you.

Brushes for Bull Jack
Slicker Brush
Slicker Brush
Nail Clipper
Nail Clipper
Brushing Frequency
fur daily fur weekly fur monthly
Bull Jack requires weekly brushing
Daily Weekly Monthly

Bull Jack Temperament

The Bull Jack will inherit personality traits from both of his parents. Both the Bulldog and the Jack Russell Terrier can be stubborn and resist training. The Bull Jack is not recommended for first time dog owners. He will need to have early socialization and consistent leadership. Patience, exercise and persistent training are necessary.  A medium to high energy dog with parents that are playful, affectionate and good with children, an active family that is willing to have him involved in all they do is the best.  The Bull Jack does not like being left alone for an extended period of time. He can suffer from separation anxiety, which can lead to behavior issues like chewing of furniture and excessive barking.

Bull Jack Activity Requirements

The Bull Jack will require daily walks, exercise and interesting activities to prevent him from getting bored. The Bull Jack will enjoy joining his owners on hikes and runs. His Jack Russell side may give him a high energy level, although the English Bulldog parent is more laid back. This hybrid can live in an apartment if daily exercise and activities are provided but will thrive in a home with a fenced yard where he can be taken out often for spurts of running in the fresh air. The Bull Jack should not be walked off leash due to his possible prey drive. Additionally, the he'll appreciate visits to a dog park where he can practise his meet and greet skills, or agility training that will allow for expenditure of energy with a job to do.

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

Bull Jack Food Consumption

Cups Per Day
3 cups
cup per day cost cup per day cost cup per day cost
Daily Cost
$1.20 - $1.40
food bowls daily cost
Monthly Cost
$35.00 - $45.00
food bag monthly cost

Bull Jack Owner Experiences

3 Years
3 People
The best dog I’ve ever had. Loving, caring, happy, funny, best behaved, intelligent. I sound biased but even if he wasn’t my dog, I would say the same. He gets the odd ear infection but that’s all. Everything else about him is 110%
4 weeks, 1 day ago
2 Years
4 People
We love our bulljack Hank he is such a good part of this family,He is extremely good with kids,Loves walks,playing fetch,and tug of war.
2 years, 10 months ago
Bella Ruth
9 Years
3 People
House & Yard
She’ll lick our worst enemy to no end!
6 years, 5 months ago
14 Weeks
1 People
House & Yard
Love my Bull Jack very cuddly so sweet natured more Bull than Jack
5 years, 2 months ago
6 Years
3 People
House & Yard
Shes definitely a licker... great with adults n kids. She is territorial in the house from other dogs. Very used to having a routine.
4 years, 9 months ago
Book me a walkiee?
Sketch of smiling australian shepherd