The Kangaroo Dog, also colloquially known the Roo Dog or the Staghound, was created in the early 1800s from a foundation stock of primarily British colonial sighthounds. The initial breeds included in creating this type were the Greyhound and the Scottish Deerhound. Later accounts include introduction of the Borzoi, Saluki and other breeds.
The Kangaroo Dog is decidedly not a breed, but is instead classified as a type, with populations today primarily remaining in the hands of hunters who wish to preserve the functional utility of the Kangaroo Dog rather than dwell on factors such as standardization or ANKC recognition.
Image credit: not specified (except those with signature on image), Public domain
Adapted from Wikipedia, CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Kangaroo_dog