Thanks Gentleman Farmer, I'm going to try this too. I'm new to chicken ownership and the flies are out of control. My chickens free range during the day and poop all over that place, which is great for the natural fertilization of the yard but not so great for the yard if anyone wants to be in it! I've tried DE in the coop and it's cut down on the flies significantly but I'd rather not dust my entire yard and garden, mostly because it looks like its snowed and it isn't helping much. I'll try your suggestion, flies gross me out! Thank you, I'll let you know how it goes.