The Nova Scotia Duck Tolling Retriever. The smallest of the retrievers, Tollers are known to be intelligent, alert, high-energy dogs & are known for being very patient with children. Their name is derived from their ability to lure waterfowl within gunshot range. Hidden, the hunter sends the dog out to romp and play near the water, usually by tossing a ball or stick to be retrieved. Its unusual activity and white markings pique the curiosity of ducks and geese, who swim over to investigate.