You need to do alot of research on both breeds as your dog could take any or alot of traits from either breed, good or bad.
Both breeds can be very stubborn and willful and need firm, fair and consistent leadership from day one.
Can I ask, do you mean olde tyme bulldogge x american bulldog?
Have you owned dogs(bull breeds) before?
Heres some info for you...
True grit. True devotion. True love. These tributes are used often to describe the American Bulldog -- a hardy, athletic, all-purpose working dog. The American Bulldog is a loving family companion, good with children and other pets, yet at the same time, fearlessly determined. It has been known to display heroic acts of courage in protecting its master. The American Bulldog has also been used to hunt everything from squirrel to bear, and has been trained to drive cattle and guard stock from predators. The American Bulldog should be evaluated as a working dog, and exaggerations or faults should be penalized in proportion to how much they interfere with the dogs ability to work.
History/Origin:
Bulldogs in England were originally working dogs who drove and caught cattle and guarded their masters' property.
Jem Burn's Cribb, around 1850 At one time, the breed was used in the grueling sport of bull baiting. With the outlawing of the sport in England in 1835, the original type of Bulldog disappeared from Britain and was replaced with the less athletic dog we now know as the English Bulldog. Yet the original Bulldog was preserved by immigrants who brought their working dogs with them to the American South. By the end of World War II, the last remnants of the working English Bulldog were disappearing in the U.S. Thanks to the breeding programs of John D. Johnson and Allen Scott, the breed was brought back from the brink of extinction. The American Bulldog was recognized by the United Kennel Club in 1999 in the rare, working class.
Height: Males: 22 - 27 inches; Females: 20 - 25 inches.
Weight: Male: 75 - 125 lbs.; Female: 60 - 100 lbs.
Colors:
All white, pied, or up to 90% color; brindle or red patches (red is defined as any shade of tan, brown
Coat:
The coat is short, close, and stiff to the touch.
Temperament:
The essential characteristics of the American Bulldog are those which enable it to work as a hog and cattle catching dog, and a protector of personal property. These tasks require a powerful, agile, confident dog with a large head and powerful jaws. The American Bulldog is a gentle, loving family companion who is fearless enough to face an angry bull or a human intruder; Good with children; Good with pets
Care and Exercise:
Brush coat with a firm bristle brush or rubber mitt and bathe only when necessary. Puppies should have early socialization.
Health Issues:
A very healthy, hardy dog. Some strains have hip dysplasia.
American Bulldog Temperament
American Bulldogs are typically happy, friendly, and assertive dogs. They are very at ease within a family and great with strangers once they get to know them.
American bulldogs are very fond of children, but at times do not realize their own strength. You should definately supervise any playtimes with children and American bulldogs, because on accident the dog may jump on the child or hurt the child.
American Bulldogs create a strong bond with their family, and therefore become very protective.
The breed needs a firm hand in control as they can sometimes have a dominant attitude. With constant training and socialization, starting early on, you can control this concern as with most other behavioral concerns.
American bulldogs can be stubborn and mischievous if they are not exercised enough. Because the dog does have a high energy drive, they need plenty of room to run and play.
You will need to socialize an American bulldog from a very young age this is so important, obediance class are very important as with any dog, but a dog of there strength and size needs to be under control at all times.
They are highly sensitive to their owner's voice but can also be very stubborn. They need an owner that can take control of any dominance issues and implement a firm, fair and consistent training regime to raise a well-balanced family companion which, if done correctly, will be a joy to own and train.
There some good books you may like to read;
1.American Bulldog (Comprehensive Owner's Guide)
2.American Bulldogs by John Blackwell
Dorset Olde Tyme Bulldogge
The Dorset Olde Tyme Bulldogge is a medium size dog whom stands proud and out from the rest, fearless, confidant, alert yet docile, showing great strength, a real power house, whom attracts stares and comments, with regards to his strong hard athletic physique, yet still close coupled and compact, enough to promote the traditional bulldog looks, that are common with regards to his breeding, stocky athletic imposing. The shoulders are muscular and slightly sloping, fore legs are straight, well boned and set well apart, elbows turned neither in or out, feet broad strong, toes tight, nails curved and strong, pads thick and tough. The hindquarters are broad and muscular, with well developed second thigh denoting power, but not cumbersome, moderate angulations at hocks, cow hocks and splay feet are serious faults. His gait is powerful, heavy, with good drive from the hind quarters. A straight or pump handle tail is preferred and most desired, but crank and cork screw is accepted. The Dorset Olde Tyme Bulldogge has a large strong head, the upper region of the head is slightly convex from one side to the other, the fore head dominates the face, however it is still wider than high, the head is furrowed, with loose thick and wrinkled skin about the throat and side of head, cheeks: prominent, due to the strong development of the muscles, broad muzzle: with obvious folds, broad and deep, keeping it's length in comparison with that of the entire head. The nose is broad, with well open nostrils; lack of fore face with nostrils set on top of muzzle is a reversion back to the kennel club bulldog and is very undesirable. Care is taken to keep the traditional strong bulldogge head, allowing short strong enough muzzle to not hinder breathing while still keeping the solid close coupled broad set bulldog looks. The body is compact. The chest is wide and deep with ribs well sprung and well set down between the fore legs. The back is short, giving the impression of a well balanced dog. The neck is slightly arched, of moderate length, very muscular and almost equal to the circumference to the skull. The top line is solid with a broad and muscular back, withers well marked, broad loin, rather short and solid. The ears are set high and wide, rose preferred, button is accepted. The coat is of fine texture, smooth flat, short coat desired, similar to the glossy sheen of the Stafford, double or oily coat un-desired Any color acceptable, Dorset's are bred in variations of brindle, variations of pied, also black and slate gray- blue, the slate gray blue's known as Dorset Blue poole's, as a respect & tribute to the original blue Paul (pol) of Scotland, and the area of Poole in Dorset.......this breeding is still at the early stage's of Steve's breeding program, and have only just after a few years started to reproduce type, in color.
Temperament
The Dorset Olde Tyme Bulldogge is a very good all round family member, loyal among the children and keen to please and be part of the family circle, not homed as a guardian, but determined protector none the less. Keen to lie at your feet or walk at your side, a good companion very attached to his master and very affectionate; longs for leadership and to be loved. They are usually good with non-k-9 pets, especially when raised with them from puppyhood and they usually get along well with other dogs, socialize well. Be sure you are this dogs calm, but firm, confident and consistent pack leader, providing daily mental and physical exercise to avoid unwanted behavior issues.
Height, Weight
Height: 19-21 inches (48-54 cm.)
Weight: 60-90 pounds (27-41 kg.)
Preferring a strong stocky muscled physic- height and weight should be in keeping with a symmetrical, well proportioned body, keeping the appearance of strong traditional bulldogge looks.
Health Problems
Very healthy
Living Conditions
The The Dorset Olde Tyme Bulldogge can live in doors or out. If they are kept outdoors they will need the benefit of a good dry draft free kennel. They will do fine in an apartment.
Exercise
This Bulldogge can handle alot of exercise. They are keen to lay at your feet or walk at your side, but like all dogs, need to be taken on a daily walk to fulfill their primal canine instinct to walk.
Life Expectancy
Some dogs have been known to live up to 14 years
Grooming
Coat care can consist of a daily wipe over with a cloth or soft brush, care should be taken to make sure all wrinkles around the muzzle are free from any dirt or staining.
Hope this helps
