This sounds like its going to be hard to figure out. This may or may not help but I'll pass it along anyway. As far as passing gas I don't think its abnormal (at least I hope not), our ferrets do that too We had a ferret last year who would periodically vomit but then would seem fine. This went on every month or so (We would find it in the cage in the mornings when we got up). She would also vomit sometimes in the evening when we put them back to bed, sometimes. One evening she vomited but something about it was different, I guess it was her body language that made me worry. The next day she did not look good, it was Sunday and our vet was not open. The after hours clinic (not ferret knowledgable) gave her a barium test but found nothing. She looked better and we took her home. On Monday I took her to our vet but she was like a new ferret and looked great. We came home with anti-nausea meds. She didn't look quite so good the next day but we tried the anti-nausea meds and waited. On Wednesday she looked a lot worse and we took her back to the vet. He did exploratory surgery. The surgery was long, she had bleeding and blood pressure problems, as he couldn't find anything wrong. He finally found that she had a tumor in the lumen of her intestine. It would allow liquids to pass but not solids. She woke up from the surgery but didn't survive until the morning. She was my "Maple Syrup" girl because she smelled like maple syrup to me. She was also one of the first ferrets. It may be possible that your ferret has a tumor in the lumen (inside) the small intestine. Your vet may be able to see it, if he does a barium series. Give some barium and take a series of x-rays every few minutes to view the barium as it goes through the digestive track. If your ferret has a tumor like this then maybe it will show up as a narrowing in the small intestine. If they do an exploratory have your vet look for an area of the small intesting which is large and then narrows down. Keep an eye on Pig Pen because if he has this problem it will slowly get worse and then the blockage will get to a point where he will stop eating. Good Luck Mike [Posted in FML 6617]