Hello. First of all, I hope the parents are aware how blessed they are to have a child care provider that is doing so much to help their child (& them!). I too have a child that does this; but only if it's a food that he does not like. My response is to give him until all are finished eating and then I clear away all dishes. He then usually makes up for the minimal lunch with a hearty afternoon snack. My philosophy is that as long as I offer the food, make mealtimes healthy, varied and low-stress for them (& me!) & communicate with parents any irregularities; my job is complete. I cannot force them to eat. You have really tried your best. If it were me I would offer a very small portion, start her first to eat & clear her plate away as soon as everyone else is done. But, easy for me to say; I don't have the emotional investment with her or have to deal with it day-to-day as you do. I wish you much luck.