Tracking the wild mylar is your first problem, Bonnie. They keep to the rocky slopes where they leave few traces. Keep your eyes open for small, white fibers that have traces of a powdery substance on them. If you are successful in tracking one to its lair, the next thing to do is to set a snare or deadfall and then smoke it out. This serves two purposes. It brings out the mylar and it helps to cure the skin at the same time.

The rest of the process is much the same as with groundhogs.

At least, this is the way the process was taught to me. I have never yet located the trail of a mylar, but I keep looking.