An animal part, is an animal part, so you need to prepare it correctly.
You're going to whip up a bowl of a soaking mixture. This will be a diluted mix of borax and water. Then let the foot soak for a while.
Being rather small, I go for only a few hours.
Place it on a towel, and let it thoroughly dry.
When so, you'll need a needle and twine to sew up any wounds and openings.
A lucky rabbits foot is created using the left hind foot. I hope that's what you have, or it may not work.
Decide the setting for your foot, then consecrate it to your purpose.