For hundreds of years the now-extinct turnspit dog, also called Canis Vertigus (“dizzy dog”), vernepator cur, kitchen dog and turn-tyke, was specially bred just to turn a roasting mechanism for meat. And weirdly, this animal was a high-tech fixture for the professional and home cook from the 16th century until the mid-1800s. Turnspit dogs came in a variety of colors and were heavy-set, often with heterochromatic eyes. They were short enough to fit into a wooden wheel contraption that was connected to ropes or chains, which turned the giant turkey or ham on a spit for the master of the house.
via http://www.atlasobscura.com/articles/the-best-kitchen-gadget-of-the–1600s-was-a-small-shortlegged-dog