Where did you find proof Gary? You stated it's proven that it is harmful but you neglected to show us where you found the proof so we can look it up. I am a member of 2 different groups and we have been actively looking for proof one way or another and all we've found are alot of opinions but no proof anywhere. All I can find on the subject is towards humans but not ferrets. Thanks, Lois [Posted in FML issue 4339]