Megan
This may be a beginning sign of insulinoma. By 6 year old insulinomic girl
Belle does this. I think it is because of excessive salivation.
 
Take her to the vet to have a fasting blood sugar done.  Fast her for about
4 hours.  Different vets have different thoughts on what constitutes a low
level.
 
Mike Janke has a wonderful new web page on ferret health care with links to
lots of info on insulinoma (and adrenal).  You can find it at
http://www.miamiferret.org/FHC/
 
Linda Iroff
Raisin Retreat Ferret Shelter
Oberlin, OH
http://www.oberlin.edu/~liroff/ncfs.html
[Posted in FML issue 2462]