White Tooth (also translated as Snow Tiger) is an animal description novel published in 1906. With the cold Canadian Arctic as the background, the author uses anthropomorphic methods to describe the story of a mixed-race German shepherd dog born in the wilderness. When he was a few months old, he returned to human life from the wild world with the help of the female wolf and changed from a wolf to a dog.

Call of the Wild, also known as Call of the Wild, is a famous novel published by the writer Jack London in 192 1. The story tells the story of a dog named Buck who finally returned to the natural wild environment after suffering. The whole story is based on the gold rush in Alaska, and tells how Buck developed from a domesticated southern dog into a savage state like a dog and a wolf in order to survive in the sinister environment in the north.