"Ferrets make wonderful pets, but their distinct odor can bother some people. I have 2 female ferrets, ages 1 and 2. Although the females do not smell quite as musky as males do, the fact is that they still have a musky odor. I've searched forever to find a product to help mask their odor and finally found a product that was safe, easy to use, non-toxic, and effective. The "Marshall Pet Bi-Odor Internal Waste and Urine Deodorderizer" is a fairly inexpensive product that works very well. I usually add 2 pumps to the water bottle each time I refill it. I've been using this product for approx. one year with no problems what so ever."