Protein treats are good for almost all ferrets, except possibly those with
kidney disease.
 
A spoonful of Gerber's babyfood chicken is always a great hit.  Some of my
ferrets will do tricks for it.  (Hannibal and Attila will walk on their
hind legs to get a lick of chicken babyfood!)  Fang and Attila like bits of
raw hamburger more than anything.  Attila actually yells at anyone who gets
too close to his burger.  Silver was probably raised on dog chow (she's
adopted), because a piece of dog chow makes her happy.  (Dog chow isn't all
that high in protein, but it is less sweet than fruit, and Silver likes to
hide it rather than eat it, anyway.)
 
The sweetest treat my ferrets get is a squeeze of Ferretvite when they get
their nails clipped.  However, I have found that while they all definitely
enjoy Ferretvite, their all-time favorite is chicken (or turkey) babyfood.
 
I think raisins are questionable as treats.  In humans, raisins cause
cavities even more than hard candy does, because bits of raisin stick
to teeth and ooze sugar until you brush.  So raisins probably aren't
especially good for anyone else's teeth, either.
 
Of our ferrets from shelters, most have cavities.  None of the ferrets I've
raised from babyhood have cavities.  I suspect the adopted ones ate too
much sweet stuff in their earlier days.
 
Our ferrets get 'Bob's Chicken Gravy' twice a day plus free-fed ferret
and kitten chows that are [relatively] high in meat and fat and low in
carbohydrates.  We thought when we got him that one adopted ferret had
insulinoma, but his high blood sugar normalized.  I personally believe that
the high-protein, high-fat, low carbohydrate diet are why we haven't seen
insulinoma in any of the 18 ferrets we've had over time.
 
Jacqueline
 
[P.S.]
Just after writing I remembered that one ferret did/may have died of
insulinoma.  After adrenal surgery she improved for a brief time, then
had symptoms of adrenal disease again, and finally a few of the symptoms
of insulinoma.
[Posted in FML issue 3144]