I have 16, 3-4 month old mixed breeds of chicks (RIR's, White & Brown Leghorns, & Golden Comets. I was reading that some folks use Diatomaceous Earth to worm their flock. At what age is it OK, or for that matter, is it OK to practice this. My "research/reading" says that about about a 1/2 cup of Diatomaceous Earth per 7 lbs auto feeder is the correct mixture. And the rate/frequency should be about every four (4) months. Is this acceptable?? We also have 4 other Adult Chickens that co-exist in the same coop, and they probably could benefit from this DE also. We have two hens currently laying and have not noticed the "tell tale" signs of "dirty/poopy eggs" but we want to avoid this if DE is the way to go.