My cat is really weird. She enjoys things that crinkle. The rips paper, never eats it, steps on grocery bags (plastic) and likes to rip up the paper grocery bags. Sometimes she gets really in to it. She goes full force with the back feet to. I don't understand why, and I don't think it has anything to do with her food. She just seems to be practicing her hunting skills on things that won't fight back. It is really entertaining to watch.