I have used Petromalt for years with success. I buy it from ThatPetPlace online. Sometimes if I have a lot of time I will do some searches to find it cheapest on the internet. It comes in malt and fish flavors.

Several of my cats love it and lick it right off the tube.

Several of my cats only like the fish flavor.

And some of my cats clamp their mouths shut tight. I smear it on the upper lip and let the cat lick it off. I tried the paw smear which is what the tube directions suggest. The cat just flicks her paw and the stuf goes flying for me to find another day.

There are other similar products like Laxatone, same idea.

Most of my cats get it once a week. Chestnut needs it twice week, but that is to prevent constipation, not hairballs.

Recently I tried the haird ball food in the same brand I normally buy. With 7 cats, I was looking for something less time consuming (once i start with the tube, 4 of them go into hiding). That works well for 5 of them, gives 2 of them diarrhea.

"You can't please all of the **cats**" . . . . . So find what works best for you and your cats.