I just switched to stainless steel due to concern about feline acne. It is little bumps on the kitties chin. One cat had scratched at her boo-boos and needed surgery to correct the wounds on her chin!!!
So out with the plastic. On to stainless steel. I'm still going to run them through the dishwasher to sanitize them. But I just don't trust the plastic anymore. I'll miss that automatic feeder, though!
I feed kittens off paper plates. They like a flat dish, and it is just so much easier!