Some cats always have a small meow. We had a stray cat once that was that way, He'd open his mouth but nothing came out at all. We thought he'd never learn to meow, as his best buddy was our Saint Bernard, but sure enough, one day toward the end of that summer (he was stolen before fall) he opened his mouth and a noise came out. It took us a while to figure out what it was - he was making the sound that the cellar door's squeak made!