Merge I arrived at this discussion while clearing WP:BACK.
The Stock dog rules of the Australian Sheppard Club of America include the following entry:
Breed: German Coolie/Koolie Origin: Australia (eff 6/1/06)
Therefore it is clear, the official name in German Coolie and they are one and the same.  If some people have veered from the stock breed, that doesn't mean these articles do not belong merged.  I propose we begin the merge process immediately.