Could you post a link to what they REALLY say?
I suspect it has nothing to do with the context of this thread in general and "roadkill" in particular
http://en.wikipedia.org/wiki/Newcastle_disease#Transmission
Quote:
They are chickens
They CAN safely eat such things
Feeding them meat doesn't "promote" them to eat anything, since they INSTINCTIVELY eat meat they find
It's all natural