The Australian Sheepdog is the alternate name for the breed officially recognized as the Australian Shepherd. Despite what the name suggests, this breed did not originate in Australia but was developed in the United States, primarily in California during the 19th century. The Australian connection likely comes from the Basque shepherds who brought their dogs to America via Australia, or from the Australian sheep that these dogs were used to herd on American ranches.
Historically, the breed has been known by several regional names including California Shepherd, New Mexican Shepherd, Pastor Dog, Spanish Shepherd, and Bob-Tail due to their naturally bobbed tails. Some working ranchers simply called them Aussies, a nickname that remains popular today. The Basque heritage of these dogs is reflected in some historical references to them as Basque Shepherds.
In early breed development, there was considerable confusion and crossbreeding with similar herding dogs, including the English Shepherd and various collie types. The breed's development was focused on creating a versatile working dog capable of handling the demanding conditions of western American ranches rather than conforming to a specific appearance standard. This practical breeding approach resulted in a highly capable herding dog that could work cattle, sheep, and other livestock in varied terrain and weather conditions.
The name Australian Shepherd became standardized when the breed gained formal recognition, though many working ranchers and enthusiasts still use regional names or simply refer to their dogs as Aussies. The Australian Sheepdog moniker emphasizes the breed's primary function as a working sheepdog while maintaining a connection to the historical Australian association.

