Since this fella likes his rice & potatoes, is there any way that I could give some kind of serving suggestion on these things. I know ideally he should lay off them but we know he won't ...so what kind of guidelines could I give him? ie: don't go beyond 2 servings of high starch foods (excluding white breads or pasta) per day? (1 serving would be 1/2 cup's worth of potatoes / rice / carrots / corn / other?)