I'm a big fan of ponyplay, or ponyboys/ponygirls.
It fascinates me a lot being totally naked, wearing a harness that does not cover your private area, nor your nipples, having a buttplug in, and a chastity belt/cage on, a bit gag is of course a must, nipple clamps, hands tied or even better, wearing mittens, and of course, the most important thing, the shoes.
In pony play, the best sessions are held when the pony wears boots that don't have heels, but are shaped like a horse.
Similarly to boots that force you to walk tiptoed, but have a high heel, this is another kinky boot that often has a locking feature. Similarly to the other type of boots, proper ones are usually very expensive.
AliExpress has a sale going on, and I was able to get mine from 120 euro for only 48 euro. Even better, they have european foot sizes too, up to size 46.
Here's a link to the product: https://aliexpress.com/item/1005005065670983.html
It has 10 days shipping. Can't wait to get them. I already have socks that basically prevent you from standing on your heels, but they just use a strap, and I'm just way to scared to break something if I stand on them and see what happens if I do try to stand on my heel. These socks are awesome if I'm not even standing, but crawling, then they are great and will definitely prevent you from getting up on your feet. But if you are sitting, not so sure with these socks, and therefor, I don't find them suitable for ponyplay. These boots however, most definitely yes! I've considered ordering them like 5 times now, but every time, at full price, I was like nah... But now during the sale, I just had to!