Not trying to say anyone is doing anything wrong. BUT
I was checking out web sites and forums specificly for rodent PET owners. Most of them say that you should NEVER use PINE or CEDAR... for the same reasons you aren't supposed to use them for snakes.
They are as serious about this subject as we are with our snakes.
Just a heads up. I know there are a lot of people on this site that do use pine chips or pellets.
Mike