hjkaga, although Pine and Cedar phenols wont "up and kill" your rat, most people wont bother to change, if they can get away with just using pine/cedar shavings. A lot of people also dont consider taking their rat(s) to a vet (I always get the comment from people "you take your rat to the vet??!" and I answer, "well, yes, wouldnt you take your dog to the vet if it were sick?"). Its better, in my opinion(!), to just tell people that its highly toxic to rats, which almost forces the rat owner to look for an alternate bedding source from the beginning.
Respiritory infections can be painful to your rat too.