My kitten never mews.
I've had him since he was 6 weeks - he's 16 weeks now - and I've heard him mew twice. Once, the morning after I adopted him and I had put him in the other room and he was very excited to meet me and be fed! And two, when he climbed to the top of the mattress in the storage area and couldn't get down.
Is he broken? Why won't he talk to me? He purrs a lot.