I have heard of a kinky group of adults which pretend that they are horses. They even have shows. I think it was named "The Other Pony Club" or something like that. This looks like the type of shoes they would love.
Of course I have no idea if these particular shoes have anything to do with them.
I was sort of shocked when I ran into it myself, a friend showed it to me in the compilation of some of the weirdo kinkiness going on. This article had photographs, the people who play horses cannot talk or use their hands. REALLY weird, I mean I used to play horse when I was a kid, but nothing like this. And it was in England, and some people looking for the real Pony Club got really shocked!! That is why they called it the OTHER Pony Club. I'd rather have the real thing myself.
They cost around 270 euros, and are for 'Pony Play'...like many posters have said, it's fetish wear. They even do thigh length ones! I can only guess at how painful it must be to walk in them, but I'd love to give my farrier a fright and ask him to replace the shoes on them when he comes to see to my horses...hahaha!