I'm over at Heroes, Heroines and History talking about horses wearing snowshoes, and if you think the woodcut above is just a novelty, come over and see the rest of the photos I found to show it was more common than you might think.
I also found several newspaper clippings that mention horses wearing snowshoes and although I've only included the links on the HHH blog, here's one for you to read in case you can't get to the links.
If you enjoy this post, please let me know as it inspires me to search out more historical treasures.