We are BIG fans of the wood pellet. After trying some of the others out there, we started using them only. It's cleaner, less potty box smell and not to mention the cost factor. Now keep in mind, I have to purchase it a pallet at a time. The reason for that is, it's basically sold only in the colder climate states. Here in central Florida I had a miserable time finding it. So, I made a deal with one of the local home improvement stores and they truck in it for us. Buying by the pallet is even cheaper. Our ferrets had NO problem switching from what we were using before to the pellets. I personally find that there isn't much odor at all, if any! The pellets are made of "hardwood" and I like the "woodsy" smell. Plus, there isn't much waste at all. It doesn't break up as quickly as some other type of litter. Also, as far as I know there is no medical reason and no danger using wood pellets. We have NEVER had a single problem. Snorkeling is even better, from what we can determine.....! LOL Keep in mind, this is just OUR opinion. But, with multiple ferrets, it's what works for us. Linda and crew [Posted in FML issue 5204]