How does Bristle teach Pax to hunt?

Bristle teaches Pax to hunt by leading him to an area, where mice can be heard crawling underneath the ground. First she shows him how she pounces when she sees mouse emerge from a tunnel. Then she lays down near the entrance to a tunnel and pretends to sleep. When the mouse believes that she is asleep and slips past her, she grabs it and eats it. Then she has Pax try it, and he is successful in hunting as well.