A dance troupe I saw had a theme on horses once. They used platform boots (that had separate heels, not the space boot kind) with the heels cut off. I thought it was a clever way of eluding to hooves and still wearing shoes. But you'd basically be walking on the balls of your feet the whole time.

This is probably more complicated for your needs, but worth the look: tinyurl.com/ysgv5q

Check out this real Clydesdale image:
radio.weblogs.com/0128644/i...sdale2.jpg

Close up of another Clydesdale's front feet:
picasaweb.google.com/PamelaK...75953570

I think that would be easier to do. A larger hoof. Covered mostly in hair.

Depending on the size of your foot, you might be able to trim containers you already have or get at the store. Like margarine tubs. Cool whip tubs. These kinds of things (I'm big on links, it's easier for me to describe things in conjunction with images):
united-pack.en.alibaba.com/prod....html

Trim off the lip of the bowl. Most of the bottom would be cut out too. And part of the side. So you have a curving, flexible(!) plastic form. Holes could be punched to allow for lacing. Then...It can then be COVERED with vinyl or "leatherette" type stuff. Then small holes made in the material for lacing onto a shoe.

The shoe can simply be a comfortable pair of sneakers. If they still have plain, black (or whatever the color of your hoof will be) high top kinds, those would be great, so you can use the holes in the shoe lace area to also lace on the hoof portion. The plastic bowl hoof can further be stabilized via elastic that runs under the shoe.

There are hoof like boots, but I bet these would cost a lot:
www.youdontsay.org/Shoeboot/Shoes103.jpg

And if it's for ONE NIGHT, what is the point of spending that much, if you won't wear them again? The sneakers, on the other hand, could be worn afterwards, and would be comfortable for the parties that you attend.

P.S. Be sure to practice walking in anything you make, including STAIRS. And also, if you are going to be driving, you may want to be sure you can take them off to drive. The larger the hoof is, the more difficult it will be to climb stairs.

For fun, take a look at the shoes (that probably have broken necks) on this page:
www.youdontsay.org/Shoeboot/Shoeboot.htm

i found a great costume supply site : www.aradanicostumes.com/index.php
not only do they have wonderful items, they have articles & "how to's" that are quite helpful. lots of great pics of cons & ren faires. they had a satyr/faun hoof for purchase, so i'm going to see what that looks like; it glues to the front of a shoe.
found some great deals on hair on ebay for the fetlocks, so the researching continues! thanks to all the great ideas, or hoping for more to come! & happy valentine's day to all! >:}