The Bob is most commonly known by its full registered name, the Old English Sheepdog, though it has earned several affectionate nicknames throughout its history. The most prevalent nickname, "Bob" or "Bobtail," originated from the historical practice of docking the breed's tail, which was done when these dogs worked as drover's dogs in England. The docked tail gave the breed a distinctive bobbed appearance, leading to the natural shortening of the name. This nickname became so widespread that many people recognize the breed more readily as the Bob than by its formal name.
In addition to Bob and Bobtail, the breed is sometimes called the "OES" in breed circles and dog fancy communities, using the acronym of its registered name for convenience. Some enthusiasts and breeders simply refer to them as "Sheepdogs," though this can cause confusion with other shepherd breeds. The breed's distinctive appearance has also earned it descriptive nicknames such as "Dulux Dog" in the United Kingdom, thanks to the breed's long-standing role as the mascot for Dulux paint. This commercial association has made the Bob one of the most recognizable breeds in British culture, even among people who are not typically interested in dogs.
The recognition status of the Bob varies across different kennel clubs and countries, reflecting the breed's international appeal and historical significance. The American Kennel Club (AKC) has recognized the breed since 1888, classifying it within the Herding Group where it competes alongside other livestock management breeds. This early recognition speaks to the breed's prominence in American dog fancy during the late 19th century, when European herding breeds were being imported and established in the United States. The United Kennel Club (UKC) also recognizes the Bob within its Herding Dog Group, maintaining similar breed standards that emphasize the dog's working heritage and distinctive physical characteristics.
Internationally, the Fédération Cynologique Internationale (FCI), the world's largest canine organization, recognizes the Bob as breed number 16 in Group 1 (Sheepdogs and Cattle Dogs). The breed is classified under Section 1 (Sheepdogs), acknowledging its origins and traditional working function. The Kennel Club in the United Kingdom, where the breed originated, recognizes it in the Pastoral Group, which includes breeds developed for herding livestock. This recognition is particularly significant given England's role in the breed's development and standardization during the Victorian era.
The Canadian Kennel Club (CKC) includes the Bob in its Herding Group, following similar standards to those of the AKC and reflecting the breed's consistent type across North America. Recognition by these major kennel clubs has ensured the preservation of breed type, health testing requirements, and adherence to established standards that protect the breed's unique characteristics and working heritage. Each organization maintains detailed breed standards that describe the ideal Bob, covering everything from temperament to coat texture, ensuring that breeders worldwide work toward the same vision of breed excellence.

