Bests & Worsts Reviews from Amazon

I really liked this litter until I found out from a lady who owns a cattery that it has a substance that can cause cancer. According to her, it's the pine oils that are the problem. There is indeed a warning on the back of the Simply Pine bag: Proposition 65 Warning: Wood Dust. This product contains a substance known to the state of California to cause cancer or reproductive harm. I have lost two wonderful cats to cancer--They were in great pain and I don't want to do it again. Apparently kiln-dried pine pellets are safe because of the heat under which they are processed. This lady directed met to Tractor Supply Equine Pine Pellets.