I just took a course on anaphalaxis and it scared the heck out of me. An allergy can go from zero to full blown unable to breathe in less than 3 minutes! I have a little guy in my care who has peanut allergy and has only reacted in the past by vomiting and nothing else. His last reaction was a total accident and his eyes swelled up, his mouth and throat swelled and he was miserable. I would say it is your daycare to decide what your course of action would be but to be honest think of how you would feel if the child collapsed after ingesting peanuts "by mistake" good luck