Dogs Powering Tricycles

Dogs played a part in the history of tricycles, but the idea was short-lived.

This unusual tricycle, called the Cynosphere, was designed in France in 1875. The idea was to use two dogs, one in each rear wheel, to propel the tricycle by running on a track in the wheels. The French Society for the Prevention of Cruelty to Animals thought the idea inappropriate and further development was abandoned.