We've had an exception. He had very poor stomach and small intestine motility and a friable stomach and small intestine due to congenital deformities. In his case even food remained in the stomach for 8 hours plus. Rare problem and tricky to help, but know that setting absolute limits may not work well. Limits for MOST -- now THAT works well. He had to go to actual 12 hour fasts for food to avoid regurgitation aspiration risk but his fluid fast was much shorter. Sukie (not a vet) Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/fhc/ http://www.ferretcongress.org/ http://www.trifl.org/index.shtml http://homepage.mac.com/sukie/sukiesferretlinks.html [Posted in FML 5653]