Here's some tips on how to keep the odor down...
*Keeping the litter box clean will significantly reduce odors. I clean out my litter box, 1x day.
*Different kinds of litter perform differently at absorbing moisture and controlling odors. Most people use recycle newspaper pellets or wood pellets for litter.
*One of the most effective ways to keep your ferret smelling fresh is to keep the ferret’s bedding clean.
*Animal waste causes odors. You can control the both the strength of the smell and the amount of the waste with a proper diet.
* Make sure your cage is made out of washable materials, such as plastic or coated wire. Wooden cages will hold the odor in.
*Bad Breath can cause odor, please check your ferret's teeth. Ferret could have dental problems
*Check those ears! A common contributor to strong ferret odors is dirty ears.
*Do not bathe your ferret. Bathing strips the ferret’s skin and fur of essential oils, and "dries the ferret out." Dry skin is itchy skin, which is uncomfortable for your ferret.
*Fixing your ferret. The strongest contributor to ferret odor is not the scent sacs or glands, but the hormones.