I have a Carolina Dog, and she is amazing-- far and away the best dog I've ever had. Medium sized, full of energy, loving and EXTREMELY intelligent. Carolina dogs are recently redomesticated (feral dogs that were discovered and then domesticated). They maintain a strong pack mentality, and are very loyal but at the same time maintain some independence- she's able to amuse herself almost without end. She was very easy to train (took us 1 day to housebreak her), and she never destroyed anything but her own toys. She plays extremely well with other dogs too. They can be hard to find, but from what I understand, other similar breeds (such as the Canaan Dog) have similar temperaments.
(not my dog, but she looks almost exactly the same)
