Yes Deaf ferrets will still make sounds at times they can even be a little
more vocal.  We have 2 who are very deaf and a couple we think are just hard
of hearing (both of these are Spotted Pandas).  Both of them(deaf) Dook
occasionally a lot of hissing and Angel when startled sometimes will even
Bark.
 
--
Shanon, Mitch, Callie (cat), Kerowac (iguana), Brambles and Rose
(hedgehogs), and last but not least The Den of Thieves (ferrets-Switch,
Smokey, Blaize, Tamara, Polar Bear, Diablo, Chiquita, Prancer, Angel,
Critter, Chevy, Sunny, Red, Cupid Cuddles and Puddles) and one Foster
ferret Bandit
[Posted in FML issue 1885]