Long-haired, cross, bitey cat, who's never really accepted being brushed! Now she's getting older, she's getting matted areas, which I'm waging a constant battle against. She is, however, getting more willing to accept brushing as long as it is on her terms, as part of a "stroke me" session. I need to find something which can get deep enough into her fur to stop the matts before they get too well established. Any ideas??