I know about not using cedar chips but growing up my grandma have a huge run and it always had cedar trees in it. The only half shady spot I really like for our coop is under a big cedar tree. I have a tin top over my 10x10 pen but the cedar needles still gonna get in it. The chickens seem to be fine now after 2 weeks being in it nonstop. Can somebody tell me it is indeed a bad idea and why?