We had such a mild winter and a wet spring/summer, the bugs are horrible!! Mosquitoes, etc. I am new to chickens and don't want to hurt them!! I have Food Grade DE and was going to sprinkle throughout the run which as of now, is dirt and grass. Will this be okay and if so how much? I have a 25 x 25 run. My girls are itching and I know when I go out I itch and get by every mosquito within a mile. Any advice is much appreciated!!!!