Ds is 2.5. He has recently (past week) started biting.
He does it when he's tired/frustrated. Now if he does it to me I obviously have the strength to hold him back and calm him down.
Yesterday he was playing with his cousin who is older (and taller). Cousin was holding toys up out of ds's reach. After say 20 seconds, ds unable to reach the toy, he just grabbed him and bit him (HARD) on his arm.
The bite marks were bad. I was totally at a loss as to what to do. I shouted at ds, removed him from the other children, explained what he'd done was very naughty. Showed him the bite mark, made him apologise to his cousin. Then got him to repeat back to me why he'd been naughty. His reply: "because I bit xxx and made him cry and only naughty boys bite". Hoorah I thought, result.
Half an hour later, similar situation, he bit him AGAIN!!!!!
At which point I took ds home (in tears myself not knowing what to do).
How do I cope with this? I can't leave him playing with other children knowing how badly he will hurt them if he bites.
But at 2.5 he's just not taking it in how naughty it is. He does listen. But then as soon as he's frustrated he does it again.
Any advice?