The Border Collie is a working and herding dog breed developed in the Scottish borders for herding livestock, especially sheep. It was specifically bred for intelligence and obedience. It is very fetch-oriented. The use of dogs for herding sheep makes good economic sense for many farmers. In a typical pasture environment, each trained sheepdog will do the work of three humans. In vast arid areas like the Australian Outback or the Karoo Escarpment, the number increases to five or more. Attempts to replace them with mechanical approaches to herding have only achieved a limited amount of success. Thus, stock handlers find trained dogs more reliable and economical.