Do ferrets have mites

Answer 1

They can catch ear mites.

I agree with the above answer, they can also suffer with fleas.

Ear mites are the most common ear problem in ferrets. Luckily they are easy to spot and treat. Chances are your ferret got them from another pet. Normally, ferrets produce a reddish-brown earwax. If the wax is almost black, and there's lots of it, ferret ear mites are most likely the cause. To be absolutely sure, you will need to have it checked out by a vet though. They will examine the ear wax under a microscope where they can actually see the tiny insects crawling around.