Obsessed With Turtles
Join Date: Jan 2003
Location: Land of Procrastination (MN)
To be honest I don't have a clue... You may want to call your vet & ask them. I know as a general rule here in MN (and most states where ferrets are legalized) if you buy a ferret from a pet store it has already been done. If you buy from a breeder than you would need to discuss that with the breeder, as many of them have it done before they sell them.
Where are you located? (I am not sure where Kent is)