Ok I got my Food Grade DE yesterday... can someone tell me how to administer it? It said for chickens 5%. But I was wondering can you put it in their water? Any advice would be great. I've already spread it around in their dust bowl and house but I'm not sure about the amount for putting it in the food. They also said on the DE website they give it to their flock by "free choice". Anybody got any idea what that means? Thanks in advance.