オールド・イングリッシュ・ブルドッグ
Historically, crosses between dogs of different types were more well accepted at a time when modern purebred breeds (based on the eugenics principles) did not yet exist. These types of crosses were performed to aggregate qualities of two different types in the same dog or to perfect an already fixed type of dog, always for working purposes. An example to be cited is the famous case of Lord Orford's Greyhounds, which were improved by adding courage through the crossing with Old English Bulldogs, achieving the desired result after six generations. With the success of Lord Orford's dogs, the practice was adopted by other Greyhound breeders and became more common.Other historical examples are the bull and terrier (Old English Bulldog and terrier cross) and crosses between foxhounds and Old Spanish Pointersthat later resulted in the English Pointer.