I have been poking around through various threads and have found mulitple times from diff. people saying that cedar chips are bad for chickens. I have two 8 week old silkies in their brooder with this!!!!!! Will they just fall over and die? Why is it poisonous? It says 100 % natural! If it hurts chickens why doesn't it hurt hamsters and rabbits and stuff. their lungs are just as small!