Now I know why my cats won't touch them!
My cats will eat the most expensive canned cat food available (but I must say, when I open it, it smells like people food), liver and, I blush to confess, poached chicken breast. They also eat a kibble infused with tryptophan to calm them down, and it seems to be working.
We drop the pills on the back of their tongues as well - no problems, but it needs two people because of the claws.