Perhaps the vet said "Proliferative bowel disease" and in your stress you misunderstood her. It is a disease that could match the symptoms you described. I would think that the vet would realize that 6 months of age is very young to have insulinoma, and would have checked for other, more obvious signs rather than rely on a simple blood glucose test. Also $800 to $1000 is quite high for a pancreatic operation; at least around these parts of the US. I'm glad your regular vet got back in time to prevent a costly and possibly dangerous operation on your sick ferret. Dick B. [Posted in FML issue 2429]