I've noticed, with every case, that an insulinoma ferret will have an
unusual odor.  It ranges from maple syrup sweet to a kind of uriney smell.
It's one of my first detections in rescueing ferrets.
 
Inola smells like a corn chip!  Except when she poofs!  She doesn't have
insulinoma.
 
Carla Roberts
 
"Worry," replied Jimmy Skunk sagely, "is the result of being unprepared.
Anybody who is prepared has no occasion to worry."
 
The Adventures of Jimmy Skunk-Thornton W. Burgess
[Posted in FML issue 3546]