My mom and dad have been using all pine under the litter in Clover's litter pan since they got her almost two months ago. I asked around and the people that i have talked to said that it was safe as it has been kiln dried and it is not oily to the touch either. Clover has had no ill effects from this and I asked her original owner who i found out also used it. I personally don't use it yet, but am seriously considering it. Jenn, Whiskers, Sweet Pea, Damien Missing Minnie and the adopted three: Mickie, Emily and Midget [Posted in FML issue 4335]