Ferrets are more closely related to dogs than cats. Dogs, cats, foxes & ferrets are all susceptible. Lions/hyenas/African hunting dogs are even infected by it. Personally, I have my dog and ferrets vaccinated against it, because usually by the time an outbreak of CDV in an area is made public, many infected animals are already dead. I wasn't charged a consultation fee for any of my animals, just for the vaccs, even though the vets gave them all a thorough checkover before they were given the shot. The vet also kept them for 30mins after the vacc to ensure they didn't have any adverse react