Hairballs - pumpkin - taste

Since I switched Emily to Wellness canned cat food she has had hairballs
- evidently too little fiber. Every other cat food I've tried gives her
diarrhea. I finaslly discovered that ~ 3 tsp pumpkin daily kept the
hairballs at bay. Unfortunately, she hates the taste of pumpkin mixed in
her cat food in the second of her three daily meals and eats it _ very_
reluctantly, only out of hunger at the far end of the day. Anyone found a
more palatable way to feed pumpkin? (I thought of mixing it with a half
can of tuna but Google tells me feeding people-tuna to cats is evidently
a bad idea.) Or another hairball cure? Laxatone and other products with
the same active ingredient don't work well at all with her. I've tried
other forms of people-type fiber like natural flasvored Metamucil, and a
type of fiber that is tasteless. She eats them more readily, especially
the tasteless, but they don't work on her hairballs. Maybe some other
fiber, like wheat or oat bran? I woder why the pumpkin works? According
to the label doesn't seem to be particularly high in fiber.

Suggestions?

TIA

Ken


--
"When you choose the lesser of two evils, always
remember that it is still an evil." - Max Lerner