Sounds like you are doing the best for Rocky. I have two additional
suggestions: Have you tried diazoxide? I have had very good results
with it - generic as well as name brand. Also, towards the end, my
ferret vet suggested adding some high sugar supplementation to their
duck soup/chicken gravy ... like a bit of karo syrup. She explained
that it does not cause wild up and down swings in the sugar levels
as it does in people.

[Posted in FML 5617]