Ever sincedogswere first domesticated about 18,000 years ago, theyve often had jobs to earn their keep.
Today, some dogs are used to herd sheep while others help hunters track and flush out game.
The rig was powered by two dogs and apparently could reach a speed of roughly 6 miles per hour.
The Cynophere, a dog-powered velocipede, was invented by the French mechanic Narcisse Huret and patented on December 14, 1875.Illustration: Universal History Archive/Universal Images Group (Getty Images)
And attitudes around whats an acceptable occupation for a dog changed with it.
The treadmill, after all, was originally invented in 1817 as atorture gear.
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