I have called these animals , borrowing an old word for war-horses. I've given them clawed feet instead of hoofs because I think the genetic engineers will give them claws too. The horse's hoofs seem to be an evolutionary mistake. To speak in Lamarckian terms, the horse has lengthened its legs by standing on its toes until it has ended up standing on one toenail. [...] Cheetahs, wolves, and greyhounds all have nonretractile claws that serve them as their spikes serve runners and baseball players. Racehorses could not run as fast as they do if they did not wear aluminum or magnesium shoes.
Gene Wolfe