My daughter is pretty thin and a terrible eater. It doesn't matter if she is under surpressed or over surpressed she just doesn't really like to eat (too busy). At our last visit with our endo, she didn't gain any weight but grew in height. She is almost 2-1/2 and wears a 2T which is fine in length, but always too big in the waist especially now since she is wearing big-girl panties.