The Nova Scotia Duck Tolling Retriever is a medium-sized gundog bred primarily for hunting. It is often referred to as a 'toller'. 2 Use in hunting. When the birds are close, the hunter calls the dog back to the blind then rises putting the birds to flight allowing the hunter a shot. The Toller then retrieves any downed birds. The Toller then retrieves any downed birds. They are particularly suited for retrieving in cold water climates because of their water-repellent double coat. Duck Tollers are working animals and are happiest when they have a job to do. Duck Tollers are working animals and are happiest when they have a job to do. Tollers are excellent hunting companions. They excel at many types of sporting competitions such as agility, dock diving, and obedience.