DS is 1 on Sunday and for the last month or two has been trying to take chunks out of me and DD with his needly little baby teeth.
I’ve tried saying “NO!” V sharply, but the wee bugger just laughs and goes for another lunge- clearly thinks it’s a game. It’s bloody sore when he does it as well, he really goes for it, and it’s not like I can punish him or have a reasoned conversation with a 12 month old.
Dd is 2 and has started to really avoid him because she anticipates he’s going to bite her 
What can I do? The only advice I’ve got from family is to bite him back, which I’m obviously not going to do because it’s not the 1700s.