@sinbaje:
Google 'lancashire heeler' and I think you might find your dog. :O)
It certainly resembles one but those are extremely rare.
From the AKC website:
"The Lancashire Heeler is a rare breed, numbering only around 5,000 worldwide."
@Kirsten:
Yes, google "Decker Rat Terriers." They look very basenji-like, but are a bit shorter and heavier.
Deckers do not have thick, stumpy legs and a low-slung body like this dog has. There is a short-legged, long-bodied version of Rat Terriers called Teddy Roosevelt Terrier. I could see one of those as a parent of this dog.
*Disclaimer: This message was written B.C. (Before Coffee) and the author cannot be responsible for lack of clarity caused by cobwebs being interwoven through brain cells.