I have heard that commercial breeders throw styrofoam in with the chooks to curb aggresive behaviour. Curious if anyone else has heard this? Anyway, my girls have gotten in to styrofoam in the past (escaping bean bag balls) and they went crazy birko over them! i dont want to feed my girls styrofoam but decided to try out popcorn (similar texture). They LOVE it! Thought i would post it in case anyone has aggressive chook problems and wanted to trial it.