I suggest swheat scoop small animal litter, its is completly natural, it naturally eliminates odors, is clump using natural enzyms in the wheat so it is complety safe to eat. its bio-degradable, certified flushable, and I only go through 1 small bag a month(scoop out the dirty stuff every night and add a little more each time) it oly takes $12CDN a month out of my budget!