sled dog
1 a dog, as an Eskimo dog, used to pull a sled (def. 1), especially in the North. See 1577 quote at sled (def. 1). [See picture at sled dog.]
See also: Eskimo dog hauler sled (def. 1) sledge-dog sleigh dog
2 See 1896 quote.
See also: steer-dog