i know that cedar is toxic to mice and rats. that's why i was surprised by the result of the paper. You can check it out from the link. This study is also pretty current (published in 2010).

I also saw another article that said that when kiln dried pine are wet, it will also release aromatic compound just like regular pine. So that article suggest that kiln dried pine shavings are no better than regular pine shaving. However, that article was published a while, so i'm not sure if that is still credible.