DS is 14 mo. He is a lovely, cheerful, sociable little chap, but he's recently started biting. First it was just me and DH and seemed to be teething related, but it's got worse in the last 2 weeks and last week he bit another child.
We have always told him no in a firm voice without smiling but it doesn't appear to have done any good.
The child he bit is his favourite little playmate, I am great friends with this little girl's Mum and we spend time with them once or twice a week. The Mum was fine about it, but I was mortified and I'm so desperate for it not to happen again.
He mainly does it when he gets over excited, rather than when he is cross/grumpy.
Any advice very gratefully received!