I'm having huge problems with my 3 year old son drinking anything! I've tried water, juices, squash, those fruit shoot drinks - he won't even contemplate milk. Thing is, it's a bit of a concern for us, because we have to catheterise him twice a day, so urine infections are a constant source of worry for us. He's up at the moment, complaining of stomach ache, he's likely to be constipated because he's dehydrated and we know that he hasn't drunk enough today. He has Spina Bifida, so constipation is always a bit of a problem too. I'm desperate, really. Can anyone help? Just how much should he be drinking?