I've posted on this several times so I'm going to give a quick answer this time and wait a while before I put in a longer description again. The 'litter' we've decide works the best for us is 'wood stove fuel pellets'. These are compressed wood chip pellets use for heat in stoves or grills and available at woodstove stores. If this is not available in your area try to find a litter called 'Pine Fresh' It is composed of compressed pine chips. In both cases these chip or the saw 'dust' leftover from lumber mills so the pieces are about an 1/8th inch after it decompresses so its not the huge chips most people are used to. The pine fresh does not have the over abundance of aromatic oils like the wood chips sold for guinea pigs and the like. bill and diane killian zen and the art of ferrets [Posted in FML issue 1253]