[spyro87]

I was thinking perhaps some kind of, high pitched frequency noise maker might show up issues?
Y'know, if there is no reaction from the hamster, maybe there really is something wrong...?

I wonder though, what kind of care would be needed for such a hamster? :/ that can't exactly be ideal? and what, more to the point, would cause a hamster to be deaf? They're notorious for their amazing hearing.... how would a hamster manage without?