Horse Hooves to Bubblegum

I'm working on an article for the site that lists wive's tales and superstitions related to horses.
For example, that a horseshoe is good luck, or that horse hoof put into a microwave turns into bubblegum (?? I have no idea where that originated....Do you? How long do you cook it for?).

I just read about a "Nail Test" to determine pregnancy/foal sex. You take a hair from the mare's tail, and tie a nail to it. Then you hold it above the mare's hips... and if it doesn't swing, she's not pregnant. If it swings in a circle, she's carrying a filly; if it swings straight, a colt.

Uh, my gelding's gonna have a colt... :D