That really is a relief. There's also a malt-flavored hairball remedy in paste form (I think Hartz makes it in the U.S.; Gimpet is the best-known brand here), but not all cats like the flavor. You could also start growing cat grass now. Don't bother with the "kits", as it's cheaper in the long run to buy some seeds, potting soil and a medium-sized pot that isn't easily tipped. WalMart carries cat grass seeds in a little packet.