The breed was used in Great Britain as carriage horses and were also imported into the United States. They were considered to be very stylish to drive during the late nineteenth and early twentieth centuries, when automobiles were still uncommon. After horses were replaced by cars as a primary means of transportation, Hackney ponies, along with many other horse breeds, were deemed unable to contribute to society and declined considerably. After World War II, however, the Hackney pony developed into primarily a show pony, and remain being bred for that purpose today. Thus their drastic decline in numbers and plight toward extinction came to an end, and the breed was popularized once again.