I took my 91 year old father with vascular dementia to the hospital last Thursday morning. He had been having loose bowels for 4 days and wasn't eating or drinking. He had gotten so weak, he couldn't stand. He's still in the hospital, not eating or drinking. I guess I'm wondering what happens next? How long can someone go without eating? We have all of the proper documents in place: DNR, Living Will, Medical Power of Attorney (me).