When a ferret is exposed to adv... he may or may not eventually develop the full spectrum of symptoms of ad. The ferret my have no obvious symptoms and lead a relativley full life (but will still be contagious to others). Other ferrets will develop AD and symptoms (and be contagious as well obviously). The hard part about adv...is you ferret could have been exposed to the virus and be carrying it (making them contagious) but you may not have a clue they have it til later if and when sypmtoms do surface. Wolfy Please visit: http://www.geocities.com/wolfysluv/ For information on deafness in ferrets: http://www.geocities.com/wolfysluv/deaf.html [Posted in FML issue 3197]