I've found the best way to control ferret odors is NOT using "products". It's religiously cleaning the litter boxes twice a day and keeping clean bedding in the cage. I totally strip down my cages every two week and wash all of the bedding and clean the cages. Others do it more frequently. No odor control products needed here. BTW, I currently have 9 ferrets in 3 cages. Katharine [Posted in FML issue 3796]