Whiskas anti-hairball treats - any good?

[Susanne (urbantigers)]

Mosi has these sometimes.  I'm not convinced they are that good really but hard to be sure.  Mosi coughed up a furball about a week ago and he rarely does - he usually just coughs and retches a bit then it seems to pass through him.  Not sure whether it's good or bad that he brought one up but that did happen after a period of him having only whiskas hairball treats as I'd ran out of dreamies (I know - I'm a bad meowmy).  I'd have thought the aim of such treats would be to help them pass out the other end.

[jezebel]

My two didn't think much of them, and according to the packet they need to eat quite a few every day for them to be effective.

I also tried the solid stuff that you smear on them and they hated that! I've given up now, and since the good weather they've been outside eating so much grass that hairballs are no longer a problem!

[Tiggy's Mum]

I think one of the boys may have a hairball (won't go into the gross details why  ). They don't eat the paste on it's own and the defurrum treats have changed recently, they're now chewy rather than crispy and the boys don't seem so keen.

I got some Whiskas hairball treats (same tub as the temptations) and  the frenzy! They are loved even more than temptations and dreamies but was wondering are they actually any good for hairballs?