I have a 4 year old in care who is like this, she eats like a bird at lunch and now does not nap so about 40 minutes she is asking for food because she is hungry, so I tell her I have the rest of her lunch if she is hungry or she will have to wait until snack which is at 3:00. She is the hardest child I have ever had for food - now that she is very verbal she now runs to the table and then tells me what I serve her is 'yucky', mainly does not want homemade cheesy noodles but KD.