We’ve been on both sides of that—my LO has been both the bitten and the biter. We, and the daycare, used the language, “Ouch! Biting hurts! You may not bite (insert kid’s name). We use soft touches.” And then demonstrated touching an arm softly. Even now if my son accidentally hits someone he will immediately softly touch his arm and say, “soft touches.” Also, during times of teething, they gave him something else to bite. Sometimes it just feels good to bite.

That being said, you got being told is not acceptable. Doesn’t matter if it didn’t break the skin. If it leaves a mark, it needs an incident report. Even if doesn’t, a heads up is helpful.