I went through quite a process to make the hooves for my costume at Burning Man. After I finally figured out how I'd do it, the first step was to make a mold from my shoe. After the mold hardened, I sprayed the inside of the mold with a releasing agent and poured the liquid rubber solution into it. It dried over night. Excited to see my new hoof, I discovered that I couldn't get it out of the mold. It seems that the rubber leaked into the little cracks in the clay and firmly wedged itself in there, so I was forced to break my only mold with precious little time to spare. So there you have it. The first picture is a block of rubber with a broken plastic spoon in the middle (don't ask).

The second picture is my second hastily assembled, partially dried mold filled with the rubber solution.

Now I have two rubber hooves, and I'm still not sure what to do with them. The goal is to attach them to my shoes and have my furry legs seamlessly transition to the hooves. When I have that figured out, I'll be one step closer to being a bad-ass Pan.