Liesje
Blue Crack Addict
Iams food is really nasty, on the spectrum of available cat kibbles. Pretty much any grocery store brand is bad. I would 1) brush the cats often to help remove undercoat, 2) first try a better diet in general (doesn't necessarily have to be a "hair ball" formula, just ANYTHING better than Iams). I don't know much about hairballs, maybe canned food would be better? I have 3 cats and only one gets hairballs, like once every few months.