Do you recall the conversation where several litter types got mentioned including Hunt Club which contains the zeolite Clinoptilite? It worked incredibly well for removing ammonia so the waste had far less odor and the risk of mold growing was greatly reduced. Also, it is so safe that it is used for water purification and as a food additive. The only problem ever found with it is that those who process it sometimes get eye or mucus membrane irritation from the dust. (Yes, I looked up the safety sheets on it at the time.) Anyway, we have found the amount seems to variable in that litter so we went on a quest for the Clinoptilite by itself, and we found it: Ammo Cat. It runs about $5 for 24 ounces and about $9 for 48 ounces. Several places sell it if you do a Google search for "Ammo Cat". (It's easier to find it if you use the quotes.) We plan to order some tonight. I have some questions about the food additive use of other Clinoptilite products, but I think that maybe the answers are not out there yet or not out there fully yet, though I plan to look. These are very rough questions which so far lack my looking into them to any degree. Given that it is used increasingly as a food additive (though I have not seen it in ferret food so far) and given that it binds to and deodorizes ammonia so well: 1. Is there any chance of it decreasing amino acid uptakes? 2. Might it reduce waste odor even before the animal urinates and defecates? 3. Does nitrogen processing create any of the strain of high protein diets on diseased kidneys, and if so might a mineral which binds it help reduce the strain on kidneys? -- Sukie (not a vet) Ferret Health List co-moderator http://www.smartgroups.com/groups/ferrethealth FHL Archives fan http://ferrethealth.org/archive/ replacing http://fhl.sonic-weasel.org International Ferret Congress advisor http://www.ferretcongress.org [Posted in FML issue 5055]