The ferrets were OUT of the home for the fumigation, right? And they will stay out till it is all dry and vented, and maybe even washed and dried afterward depending on what was used, right? Your roommate may have to move out if you hold the lease, or you move out if he does. He should get a hepa filter air cleaner (Environaire is among the ones recommended by pulmonologists and allergists; I think of those by name simply because we have them) and NOT get a free-standing electrostatic filter because those tend to create ozone (though current ones produce less than earlier models current research indicates that even low levels of ozone are hard on lungs). If that doesn't work you need to know that there is a documented case of a man who developed anaphylactic reactions to ferrets who almost died. Allergies to ferrets are rare but they can be severe. Make sure that the roommate is not reacting to a litter, shampoo, or other product rather than the ferrets! That seems to happen a lot. Check the foods and supplements fed to make sure there is not a food ingredient to which the roommate is very allergic which may be circulating in powder form. Is your roommate allergic to cats? Many who have reported allergies to ferrets are allergic to cats, and often the individuals seem to react most to whole males or to males with adrenal disease (which in some ways, including the musk characteristics under hyper hormonal aspects of adrenal disease can resemble being whole). Sukie (not a vet) Reminder: THE FERRET HEALTH LIST IS MOVING. To join, click on the joining link at http://groups.yahoo.com/group/ferrethealth and then follow the directions. OR just send a blank mail to the automated joining address: [log in to unmask] and then follow the directions. Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/fhc/ http://www.ferretcongress.org/ [Posted in FML 5432]