answer the call of the wild

Can you imagine a dog pulling a sleigh in the snow all day in order to avoid being whipped?Can you imagine a dog digging a hole underneath the snow in order to stay warm and sleep? Can you imagine a dog killing several people in order to avenge his beloved master's death? Can you imagine a dog killing a wolf in a few seconds in order to protect himself?I can tell you we do have such a magnificent dog named Buck in The Call of the Wild by Jack London,a famous American novelist.