He claims to have caught it once. Maybe he can catch it again. He's Dr Ian Detweiler. It isn't perfectly visible, but with the computer I can enhance the prints so that you can see it. A fifth toe pad on the right paw.
Canids only have four toes.
Although some believe it was once a prehensile thumb. In Chinese myth the Dhole can be evil, capable of opening doors, stealing wives and disappearing into thin air. Maybe there is some basis in reality for this trickster myth. She likes to talk. I'm flattered, but, no.