Poor Boys
Much like the first image in this slideshow, there were a handful of dog-powered transportation vehicles, though they weren’t terribly efficient from an energy perspective. If this kind of thing worked well, The Flintstones would be a viable model for powering a car.
What appears notable in this invention is that the dogs very clearly have a chain attached to their neck, perhaps suggesting the dogs were not very happy with the situation and would presumably run off at any chance they got.
