I checked around on a few other sites too after you posted that. There are some folks who think even kiln dried is not safe, others who think they are all safe, incuding cedar. Most of the sites I found were for rats/rabbits/guinea pigs, etc. I think they are more likely to chew or ingest it than chickens are though. Chicks, on the other hand, who don't really know what food is yet, might be more inclined to eat them. I have stayed away from cedar shavings for years since they said the aromatic quailities make that unsafe, but always though pine was OK. I have been using it in my coop for quite a while with no problems. I never paid attention to whether it was kiln dried or not, but will now.