The Olde English Bulldogge is an American dog breed, recognized by the United Kennel Club (UKC) in January 2014.

[1] Five years prior to UKC recognition, the breed was registered by the former Canine Developmental, Health and Performance Registry (CDHPR), a privately held business located in Kalamazoo, Michigan.

[3] In an effort to rapidly achieve his goal for a purebred dog, Leavitt modeled his program after a livestock line breeding scheme developed by Nathan Fechimer, a professor in the Department of Dairy Science, Ohio State University.

[1] The result was an athletic breed that looks similar to the bulldogs of 1820, but with a friendly temperament, fewer health issues, and with longevity reaching into the teens.

U.S. researchers have said the Olde English Bulldogge is a "viable candidate" as an outcross on which to rebuild the Bulldog; a breed that genetic studies have suggested is so inbred that it "cannot be returned to health without an infusion of new bloodlines.

"[4] The Olde English Bulldogge was an attempt to recreate the "Regency Period Bull Baiter" and was developed in the early 1970s by David Leavitt, of Coatesville, Pennsylvania, in the United States.

[6] Leavitt formed the Olde English Bulldogge Association (OEBA) to maintain the breed's stud book and issue registration papers to future offspring.

[7] During the 1980s, Ben and Karen Campetti from Sandisfield, Massachusetts, worked closely with Leavitt in breeding the Olde English Bulldogge.

[12][13][14] The Olde English Bulldogge is a muscular, medium-sized dog of great strength, and possessor of fluid, agile movement.

The Olde English Bulldogge was mentioned as an outcross candidate to introduce new genetics in an effort to correct some of the problems associated with inbreeding.