I have two (possibly three, now) cats- a 5yo, long hair (n) tom named Tux and a 3 mo, short hair tom kitten Colt (possibly a 3 week old tortie girl I'm trying to keep alive called Cora).
My lh, Tux, is terrible about throwing up. Regardless of how much I bathe and brush him, wet or dry food...
My father in law heard mewling in the plant where works two nights ago, and found a kitten in a box that had come in from Germany two days before that. We know came from there because the box was still closed up. She went at least five days without a momcat.
I'm assuming she's around two weeks...