I have bought a bag of carefresh; I use pine for my rats; have for years with no problemos. I have read about pine's supposed downfalls and always swore that the second I saw a problem, I would switch; well, a newer female rat of mine has started sneezing. She was not even on pine at the pet store; it was this shredded paper bedding (really thin red/brown strips of sanitary paper; let me get the name of it..) Her eyes are reddish and runny, and she is sneezing; so I bedded her with CF.. it is pretty expensive compared to pine, but we'll see how she does on it.. I was actually thinking of using CF with my snakes; is it available in huge quantities at a reduced price?