Victoria,
This is in reference to your friend's ferret Boo (7 yrs. old, with weakness
in the hind legs).
There are some things that can cause this including:
1)Insulinoma (pancreas tumors) can present this way.  This disease can lead
to weakness,salivation, glassy look in eyes.  This is a serious disease that
requires treatment.
2)Intervertebral Disk Disease (slipped disk)- this results in pressure on the
spinal cord to the hind legs, weakness in the hind legs and stumbling or
dragging the hind legs.
3)Lymphosarcoma-this can effect the spinal cord and cause weakness in the in
legs.
 
I do know a veterinarian in/near St Louis who treats ferrets.
Dr. Wayne Boillat
314-537-3915
Good Luck. I trust you'll find Dr Boillat helpful.
 
 
Dr Weiss
301-299-4142
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[Posted in FML issue 1133]