Xiao Hei is a black dog that Lin Feng rescued from a garbage heap when it was a puppy, near death. After Lin Feng nurtured it back to health, the dog grew over two feet tall and became very intelligent, helping guard the family's chickens and catching rats and weasels. In the story, Xiao Hei licks the red elixir that Lin Feng drips on a dying grapevine, then falls into a deep sleep with steady breathing and heartbeat. He is a loyal companion and an important part of Lin Feng's life at home.