To Dale Boone - Dale - there is currently noscientific studies available on cedar chips and ferrets. We know that the volatile oils (which are generally ADDED to cedar chips to make them smell even stronger) may cause respiratory problems with humans, and rats, but no one has ever done a scientific study on it. I reviewed the literature a while back and posted my findings to the FML - should be available in the FAW, or when I get back to work on money - I'll see if I can dredge it up from my hard disk.... Bruce Williams, DVM [Posted in FML issue 1194]