I can understand what you mean. My son is 11 months and between the low pro food and and regular ones i am having a hard time getting him to eat enough food, for calorie and phe reasons. I think your daughter may be just being a toddler i know my older son who is almost 6 who does not have pku has gone a day before with hardley eating anything, and he is a skinny boy but healthy he will eat when he is hungry. enless she is loosing weight or is not growing try not to worry too much. best of luck will keep you in my prayers.