The Australian Cattle dog was bred in the 1800s by Australians to create a working cattle dog that could handle the harsh climate of Australia. The Cattle dog was bred from a cross between dingo-blue merle collies, dalmations, and black and tan kelpies. The result was a dingo-looking dog with an amazing will to work and almost unsurpassable drive. Today, the Australian Cattle dog serves as herding, guard, agility, and competitive obedience dog.
http://www.dogbreedinfo.com/australiancattledog.htm
http://www.akc.org/breeds/australian_cattle_dog/index.cfm