There are conflicting theories about the origin of the Bulldingo. While most believe it to be a cross between the Dingo and old fighting Bulldogge developed in the late 1800's, some claim that there is actually no Dingo blood at all in the Bulldingo, but rather the name being used to describe a popular Dingo-like colouring of some favored bulldogs, and others are convinced it is just a name for any crossing of the Dingo with a bully breed or mastiff. Certainly, there's some truth in all of these theories.
The Australian Bulldingo Mastiffs are used for a variety of duties, from livestock herding and guarding to fighting, protecting property and companion life. No known breeders, coupled with the lack of reliable info and a great variety of types and sizes, make the job of determining the standard very difficult.