I just read a webpage from someone selling DE... it was posted by someone here, but I don't remember who. Anyway, it said that it's safe to use but you don't want to inhale it. Well, I've been using DE since I got my chicks and it's so fine that there's no way you or the chickens CAN'T inhale it. They roll around in it and make a lot of dust, so I know they inhale quite a bit. And I have read how chickens are prone to respiratory problems anyway. But more importantly, what about us humans? Will this hurt us? Why say you guys?