I actually decided not to use DE. We have bees and I have heard it's not good for chicken or human respiratory and may not even be effective against parasites. I am adding garlic to their water. I haven't added a dust bath.. they just make one in the dirt, but I am looking into some using natural herbs. I really don't know what I'm doing, but I have learned a lot these last few months.Have you researched diatomaceous earth for parasite control? I only have 2 girls who free range, so their coop is only used for sleeping and egg laying. I use bermuda hay all through it, with pine shavings just in their night pooping spots. I pick the poop up from just their sleeping area with the pine shavings every morning and then replace the shavings. Every few days I dust the coop with diatomaceous earth and sprinkle a tiny bit in their food every few feedings. It's a natural parasite control. I sprinkle some in their dust bathing spots. I never see any indication that they have any parasite problems. If you try it, be sure to buy the food grade. It's even beneficial for humans. I take a little pinch in juice every once in a while. CAUTION! It isn't toxic, but it works by absorbing moisture, which destroys the parasites. So, be very careful not to breathe it in.