I bought a jug of DE (food grade) from the TSC yesterday to keep on hand for my new chicks. They arrive in just a couple days and I was wondering about all the actual uses for them. I've read that some people spread it in the brooder and in the nests to keep pests out, but how do you go about feeding it to get rid of worms? Just sprinkle it on the chick starter? Also, should I automatically just give it to them, or should I wait and save it in case I see signs of worms? Thanks all!