Sentry has changed the formula of it's hairball remedy, brand Petromalt. Petromalt has gone from being one of the only hair ball remedies that was not full of junk, to the one with the most junk, CORN SYRUP is now the first ingredient. It used to have a nice firm texture so you could put it on your finger and swipe it into kitty's mouth. Now it just drips and smears all over, just like the other brands.
Many cats are sensitive to corn (including my Struvite Kitty). People might not think to check the hairball remedy for corn products.
So, be aware, this has gone from a fairly decent product to the bottom of the heap, in my opinion.