If you have then post, if you have got or any or your pups have had two sets of upper and lower canines at the same time.
The jaw is not at fault, but the baby teeth have come through, then the adult teeth have come though directly beside them on the inside instead of underneath them to dislodge them.
It's easy to over look, because unless the mouth becomes sore, there is nothing to indicate that anything is wrong, after a casual look into the mouth you might be forgiven for mistaking double canines for dirty teeth, but look closer.
Now I want to know is this a genetic or inherent problem and if so can it be breed away from.
Looking for input people and records need to be kept if this is not uncommon in Koolies.
So get up close and personal and post what you find.