To Graforex: The pellets I am using is just made of straw real straw and nothing else. They grind it so it becomes like flour (I mean in very little pieces), so if they eat it there is no danger. I hope! This "flour" is compressed and turns into pellets big a little more than a cigarette (6 mm) and about 1/2 a inch long! My ferrets do not eat it maybe because they were already used to the rabbit food. It absolutely absorbs all the urine and it seems that it neutralizes the effects (smell). The cigarettes become bigger and expand a little bit. With a lot of urine it becomes like flour and drops on the bottom of the litter box! I don't know what alfalfa is and probably we do not have it here! Ciao Roberto Roberto is at [log in to unmask] [Posted in FML issue 1646]