Cool, I forgot what is necessary and what isn't. I'll probably have to go look it up again. I'm pretty sure liver is necessary, but what else can replace hearts if she doesn't like it?hoofmaiden said:First, heart isn't necessary. It's nice for variety, but your cat will do fine w/out it. Do try smaller pieces to get her used to it. I find that they will sometimes reject something for weeks and then suddenly try it and say, "AWESOME!"