Propecia can be mixed with ferretone as Mike described, or you can have a
compounding pharmacist mix it with another flavor if needed.
Propecia/Proscar will not cause liver damage.  If there is already liver
damage then it will not be cleared from the bloodstream as well.  Thus more
of it will buildup in the bloodstream.  This is not usually a problem.  In
studies done by Merck, they gave it to dogs at 5, 15, and 45 mg/kg/day for
27 to 53 weeks with no side effects.  I have not seen any side effects in
ferrets.  The only problem is the cost of this human product (30 Propecia
tablets cost about $50).
 
Hope that helps,
Jerry Murray, DVM
 
[Sukie note: I do not have the poster's permission to cross-post, so will
just repeat what we were told (not verified) as an addendum to the
Procepia post: women of child-bearing years have to be very careful with
it due to possible birth defects.  She said to glove-up since it can be
absorbed through the skin.]
[Posted in FML issue 3470]