Shortly after, Buck is sold to two French-Canadian dispatchers from the Canadian government, Franois and Perrault, who take him to Alaska. Buck is trained as a sled dog for the Klondike region of Canada. In addition to Buck, Franois and Perrault have ten dogs on their team. Buck's teammates teach him how to survive cold winter nights and about pack society. Over the next several weeks on the trail, a bitter rivalry develops between Buck and the lead dog, Spitz, a vicious and quarrelsome white husky. Buck eventually kills Spitz in a fight and becomes the new lead dog.