one contemporary recreation of the breed started in the 1970s, using a breeding program developed for cattle at the ohio state university. the lineage has since split into two, known as the olde english bulldogge and the leavitt bulldog, the leavitt bulldog being a lighter, more athletic dog. these modern day versions, though possessing similar physical abilities, do not have the violent temperament of the old english bulldog. the line-breeding was done with a foundation of half bulldog, and the other half bullmastiff and american bulldog and american pit bull terrier.