The crossword solution for the term 'Call of the Wild, Dog In' is BUCK, a four-letter word. BUCK is the main character in Jack London's 1903 novel, The Call of the Wild. He is a large and powerful St. Bernard-Scotch Collie mix who is stolen from his home in California and sold into service as a sled dog in the Yukon during the 1890s Klondike Gold Rush. BUCK eventually learns to survive in the harsh environment and becomes the leader of his pack.