Rebecca,
I smashed the Wellness in with her other food and she ate it.

So, it isn't that she didn't like it. I'm assuming she didn't like the size. I'll keep trying with the whole pieces and see if she eats them ever.
And, Jenn, I sent you a PM. Thank you for the info. Kacee has never had any digestive upsets. She doesn't have a sensitive stomach. However, if there are other good reasons, I would like to read about them, because it would be no problem to feed one and then switch to another later. The only problem with doing so that I can foresee is that they will then become pickier with what food they eat. I hope not, though.