The Australian Cattle Dog (ACD), or simply Cattle Dog, is a breed of herding dog originally developed in Australia for droving cattle over long distances across rough terrain. This breed is a medium-sized, short-coated dog that occurs in two main colour forms. It has either brown or black hair distributed fairly evenly through a white coat, which gives the appearance of a 'red' or 'blue' dog. By the 1890s, the dogs had attracted the attention of the Cattle Dog Club of Sydney, a group of men with a recreational interest in the new practice of showing dogs competitively. None were stockmen working cattle on a daily basis, and initially they were interested in a range of working dogs, including the Smithfield.