Debbie,
 
Has your vet checked the blood sugar.  Could possibly be insulinoma.  If it
was my baby I'd have a b.s. test done a.s.a.p.  If positive, try treating
with herbs.  It has helped two of mine.
 
mjo and the zoo (Phantom, Lady Star, Topanga, Ragine, Bilbo, Frodo,
Frito, Pepper, & Caesar and the dogs Garth and Darwin,.....R.I.P.
Nipper, Lightning, EZ, Cleo, and Duke)
[Posted in FML issue 2857]