headed to hospital

1 week out of the hospital and he's headed back. started spitting up 2 days ago, started changing colors. its so much he's gagging and choking on it. this morning it was glow in the dark yellow/green. Doc is greatly concerned. admitting him to St Joe, she thinks it's either kidney not functioning OR a bowel obstruction. labs, renal ultrasounds, upper GI's etc..steadily losing weight and she's concerned. We will update when we can.