Reese does it - sounds like she's dying. Abby sometimes has a small yowl, but not like Reese.

We had Phineas - big, gorgeous, orange and white love bug. He'd go out and eat grass and then puke. And he made the most awful noises before each barf.

I actually don't mind the noise so much - as you said it gives us time to spread some paper underneath. It's those silent hairballs that drive me nuts