Due South Wiki bestätigt, dass es ein bzw. mehrere Huskies waren.
"Diefenbaker was portrayed by six similar-looking Canadian Husky dogs, Lincoln, Frankie (Pilot only), Chinook, Kerry-Ann, Draco and Cinder (Draco's sister who performed most of her brother's stunts). Lincoln (Seasons 1 and 2) and Draco (Seasons 3 and 4) were the most commonly seen on screen."