This dog was originally bred by an Australian pioneer, Thomas Smith Hall, who wanted a dog strong enough to withstand the hard-work of droving cattle and the Dingo's ability to creep up silently on a prey before attacking. He thus created the Australian Cattle Dog from bloodlines of the Bob-Tail, The Blue-Merle Collie and the Dingo. The Dog weighs between 16-20 kgs and is about 45-50 cms tall.