I feel bad for their pets.
Heck, if I see my guys not interested in their food by the second daily feeding, I'm looking for something I know they will like.
And yeah, we've all read that raw is the ideal way to feed, but if your pet isn't into it why are you going to force them? I think you are doing psychological harm to just think "He's going to like it or starve."
There are only two rules at my house: House rule #1. Cats rule. House rule #2. See rule #1.