That's just it really! 9 month old has been sick for 7 days now, can only keep very watered down formula down. Doctor recommend keep trying milk and dioralyte on Friday, abs that gastroenteritis only lasts a few days so should go shortly. But it hasn't. Someone has since mentioned that being sick this much might have cleared out all his enzymes, leading to a temporary lactose intolerance. Would it be worth trying low lactose formula, colief drops or just no formula for X hrs? Am forcing him to drink some dioralyte right now while waiting for a call back from 111. Just wondered if anyone had experience of this...