Has your vet ran any thyroid test on Callie? An underactive thyroid can have similar symptoms.
Insulinoma is highly unlikely, but I thought I'd put it out there beings that was my vet's first thought.
Winston started having his problems when he was 3 years old. I was terrified, but he seems to be doing pretty darn good lately.
__________________ As Ever, Kathy 
Intruducing Bentley  Winston and Spencer: RIP My Sweet Angels |