My cat hair a bad hairball problem recently -- he was vomiting, not eating, and terribly lethargic. I took him to the vet, who diagnosed a big, stuck hairball as the likely problem. (Yuck!) I began to give him Laxaire 2X/day, and in about two days, the giant hairball passed. Now I give him Laxaire 2X/week, and I switched him from the Science Diet Light to the Science Diet *Hairball Relief* Light, and he hasn't coughed up a nasty hairball since!! (That was about six months ago.) I really think the Laxaire has helped, and I recommend it highly.