Jeffery, I don't think clay litter itself is the problem - I've used clay-based litters for years. The problem seems to be in the scoopable litters - which may also be clay but formulated differently. There is an article circulating now that was written by a cat breeder in CA. She lost several litters in a row and eventually discovered that the kittens were licking the scoopable litter off their paws and ingesting it; the litter formed obstructions in their intestines and killed them. The stool they were passing was funny looking, so she opened it up to take a look and the inside consisted of the scoopable litter. She stopped using the scoopable stuff and hasn't a recurrence of the problem. Since ferrets sometimes drag their butts thru the litter before hopping out of the pan, it's probably not a good idea to use the scoopable stuff in view of this recent finding - my personal feeling anyway. She pointed out in her article that since this type of litter is made to absorb 400% more than regular litters, it was literally drawing out the fluids in the stomach and intestines - poor babies. Debbie Riccio WNYFLFA Rochester, NY [Posted in FML issue 1197]