What sort of parent raises a biter? Me! My eldest was a biter. We had one or two incidents a week for around 6 months then occasionally for the next six months. It started when his brother was born when he was 18 months. Consistent reinforcement that his behaviour was not ok including time outs when a bit older was the answer for us. We worked in partnership with his teachers at child care to stop it.

Your son will be fine. It's not nice when they are bitten but you don't need to get him tested for anything.