I have 15 of the wonderful little fur "brats." I have next to no odor
other than the wonderful warm scent they have.  I do use the Marshall's
Bi-Odor and have for several years now and I do think it really helps.
I also use rabbit pellets for litter.
 
For many reasons: Such as, Safe for my ferrets who like to play in
it when it is changed, biodegradeable ( I rototill in into my garden)
smells clean and absorbes the wet very well and is easy to clean, also
Dogs clean the floor,LOL.  Besides I like the alfalfa odor it has.
 
Hope this helps a bit.
 
Terry and the Fabulous Frolicking Fur Gang
[Posted in FML issue 4341]