Well this is a new one. My 9 month old ds has got 6 teeth, 4 on the top and 2 on the bottom and has recently (today and yesterday) started grinding them. Shudder. Obviously I find everything he says and does charming and delightful, especially the shouting and throwing things, but this one really takes the biscuit. I'm sure it's a developmental thing etc etc but I find it really weird and also hideous in the manner of chewing cotton wool or fingers down a blackboard. Any experience of this or advice on how to make him stop or how to stop me going pale and flinching every time I hear it?