We call our deaf ferret by thumping our hands on the floor really fast.
The drumming vibrates and attracts the ferret.  If you give a treat each
time he/she investigates the thump, you will eventually have taught him
to come when "called".
 
Hope this helps!
 
Kim Wolf
Mystyx Samoyeds, Ferrets and Rescue
www.geocities.com/mystyx_samoyedsnferrets
www.petfinder.org/shelters/OH48.html
[Posted in FML issue 3524]