Acclaimed by owners for nealy a decade under the previous name of Bi-Odor for ferrets. The new GoodBye Odor for Ferrets works inside your ferret to internally deodorize your pet's waste, urine and body odors. Just one application a day in your ferret's food or water is all you need to get rid of the nasty litter box odors. It's a safe and natural way to reduce ferret waste odor.