We are finally enjoying our new coop my hubby built for our chickens. The have an attached enclosed run. I haven't added any DE yet to the coop or the run. My hubby is concerned about adding DE to the coop and run as he says if DE gets into their lungs it can be very bad and cause problems. He used to work for a pool company many years ago and DE was one of the items that they wore masks when handling it for pool filters. Since our kids have gerbils that bathe in dust like chickens do in dirt, can I use the same dust for my chickens? It's a lava dust for chinchillas and other rodents. The coop is about 3x6 ft filled with pine shavings. I checked my birds over really good and don't see any mites so far.