Lily is an upchucker, usually the very next day after I have cleaned the rug . . . I feed her Science Diet Senior Hairball formula (dry food), AND mix Laxatone in her wet food; she will not partake unless it is mixed into her food. I also give her a Pounce Hairball treat once a week. Despite all of this, she still deposits a hairball now and then. I also brush her regularly, so . . . I give up on ever totally eliminating the problem! Only resolution I can think of is giving her the lion clip, a la Spencer!