Hi X,
 
The canine parvo virus is not a problem for your ferrets.  The ferret
parvo virus is called Aleutian disease virus (ADV-F), but there is no
vaccine for this ferret (and mink) disease.  Hope that clears up the
confusion and sorry to hear about the loss of your dog.
 
Jerry Murray, DVM
[Posted in FML issue 3743]