The Australian Shepherd, also known as the
Aussie, is a breed of herding dog from the United States. The
name of the breed is technically a misnomer, as it was developed in
California in the 19th century. It is believed to have its origins in
sheepdog breeds from northwest Spain, as well as collies imported,
alongside sheep, from Australia and New Zealand; the breed reportedly
took its name from this trade. Originally used solely as a herding dog,
the Australian Shepherd has become one of the most popular companion dog
breeds in North America.