Very interesting thread! I am considering using the pellets just for the litterbox area, so I called a couple farm supply stores out of curiosity and asked if they sold wood pellets and they all said they sell "Pine Pellets". Now I know that Pine shavings shouldn't be used, but what about Pine Pellets? I guess I am wondering if there is a SPECIFIC type of wood that needs to be used for pellets? Hope this isn't a silly question!