What do most of you use as rat bedding? I have a pretty nice sized breeding operation with around 100 females. The first 6 months or so I used pine shavings from the local feed store. About 6 months ago I started getting cedar chips to mix with the pine to help the smell. I know cedar is bad for small animals but I was mixing it weak, 2/3 pine to 1/3 cedar. Everything has been going fine with it. Now all of a sudden this week I have had around 10 breeding females die. Could this be from the cedar? and if so why? Or is it just a coincedience?