my son turned two last week. he started nursery for the first time today twice a week 9-11.30 it was the first time i had left him. when i returned to collect him i was called in the office and the 2 nursey teachers told me there had been a few incidents were he had bitten 3 children for taking his cars they said the children were fine and he was playing nicely afterwards but they had to let me know i was horrified he had done this what to i do .is this normal they said it was but i feel awful about it.