have had ferrets for over 7 years now and all I have used is Johnson's Baby
Shampoo.  It works great for my little fuzzies.  Also my vet recommended it
because it did work good and was so inexpensive.  Personally I think it
makes them smell better than any other ferret shampoo I have tried.
 
Sincerely,
Jennifer and the ferret gang
[Posted in FML issue 2577]