My Molly is 16.5 and Zia is 19 (both came into rescue following owner illness, so we do know their age) and no one believes their age, Molly has always been a tiny cat, so size isn't always an indication of age - when i picked up Sam last year, i was told he was an 8-9mo female, he is more like and 11-12yo male!! Even the vet nurse thought he was a girl, as he does have a feminine look about him, and he is very small built for a male - he now has no teeth whatsoever, and is perfectly fine, he can still eat biscuits, and one of my bridge babes still ate raw meat with no teeth.