Rose: I try my best.  Plenty of brushing for my girls--one of them in particular.  Part of their food is a special hairball formula, plus they get occasional treats to help deal with that.

The one who has the worst problem is a funny eater, too.  She eats very quickly, and would be at least a kilo heavier if I didn't monitor her food intake and watch to make sure she doesn't poach from the slower eaters around here.  She'd love finding some scraps or a variety of other cat foods and snacks, but doesn't tolerate changes in her diet at all!  Even new bags of her ordinary food are sometimes enough to upset her delicate tummy...amazing.