The Australian Cattle Dog is a relatively new breed that is one of Europes lesser known breeds. Therefore anticipate a small, highly condensed description of the origins of Australian Cattle Dogs (ACD).

1840 a certain Mr. Thomas Smith Hall introduced two Blue Merle Collies to Australia. They were known for their strong will to work with cattle. Despite the undoubted qualities of these dogs, they were no match for the extreme climatic conditions in Australia. In addition, these dogs tended to work the semi-wild cattle more from the front, which was not desirable.

So it was natural to cross the Australian Dingo because they attacked its prey from behind and was also a silent hunter. The result of this compound was a powerful dog who could drive the cattle silently from behind, with maximum efficiency. These dogs were called Hall's Heelers, the origin of the breed ACD.

But to really achieve an improvement of the race, the farmers followed the pregnant, female, Dingos. These pups were left alone, so they chose the most developed male from the litter to develop a line with expectations, out of a bitch.

The result of this compound was a strong, very robust and still working dog so that the cattle could work very efficiently. Furthermore the Dalmatian at the origin was important for this breed because this should be the ACD the necessary Horse Friendly traits.
It’s still not sure whether even the Bullterrier has helped in the creation of this breed. Evidence suggesting that this breed was very popular among the settlers, and was often used to cross in other races to give the dogs the necessary "oomph". Speaking against that theory of the Bull Terrier as opposed to the ACD, were the prey gets biten with a hard grip where as the ACD just nips. The ACD tweaks the cattle only briefly in the "Heel".