Sammy's symptoms are classic insulinoma symptoms, though there is certainly
some possibility of a primary neurologic problem.  The body does not ignore
low blood sugar induced by an insulinoma, and will struggle to release
glucose stores in order to compensate for it.  I have had many ferrets with
"borderline low" blood sugars that proved to have insulinomas.  I suggest
discussing a prednisone trial or exploratory with your vet to rule out this
possibility first.  Good Luck.
[Posted in FML issue 2685]