Um. This is curious. Shoes that look like hooves. It is particularly intriguing how all these examples come at the same idea from different angles. The A.F. Vandevorst shoes (top) are delightfully hoof inspired, but the only thing that gives this effect is that the platform angles outwards rather than inwards. The iconic Maison Martin Margiela boots are not hoof inspired at all, rather just heeled versions of the traditional Japanese "Tabi" however the effect is heightened by the colour and finish on this particular pair. The piece by artist Iris Schieferstein is a literal interpretation and the ones featuring horse shoes are fetish wear for "pony play."
top to bottom:
A.F. Vandevorst f/w 09 via elle.com
Hoof diagram via chestofbooks
Maison Martin Margiela via aperfectguide
Iris Schieferstein & Fetish Boots via buzzfeed