My ds (18 months) always seems to poo during the night. It obviously upsets him because he cries a lot during the night whenever he goes. Is there anything I can change with his diet or anything I can do to make him go during the day? The night time crying is driving me spare! I was under the impression that you shouldn't change their nappies at night, but should I? He doesn't seem to cry during the day when he goes.