I didn't mean to sound too vehement, but honestly if your child was bitten hard enough to bruise someone really should have seen it. That's why the adult/child ratio is so high, to prevent and/or catch these events and work with the children to stop the unacceptable behavior from re-occurring. Many care settings will ask a parent to pull their child if biting becomes a habit. Catching such behavior and modifying it is a common job in care settings.

One way or the other I personally think you made the right decision. smile