LO was always very vocal cooing from an early age. He's now 8 months old and since his first tooth came through, he tends to keep his mouth closed as much as possible. He had started to copy mamamama and dadada noises as well as saying boobooboo all the time - especially first thing in the morning when he wanted out of his cot. Now, though, he won't copy any noises we make - he just stares at our mouths but when he is happily playing he will make a "brrrr" kind of noise making his lips vibrate but no other noises unless he is crying.
Anyone else have experience of this kind of thing? OH is worried that there is something wrong with his hearing...
Any ideas?
Thanks