I've had my 2 chickens 2 weeks. And I have flies up the wazoo. I'm concerned because I'm quite close to neighbors and while chickens are perfectly legal, I don't want to create a nuisance or bad feelings about my girls. I live in the high desert and never see flies anywhere else around here, even down at the end of the block where there's a farm with pigs, sheep, turkeys, and chickens. My coop is dry, clean, and odorless. I've read in other threads that humidity and less-than-clean conditions contribute to the problem, but there's no way to be drier or cleaner than what I've got! A couple of months ago I gathered horse manure from a nearby stable and put it in my garden. That's probably how this all got started? I have a compost pile which I have recently adapted to be covered and fly-proof. I have a dog who does a poop or two a day in the yard, and I clean it up pretty promptly. I'm now doing a daily (or more) check. I have a litterbox in a cat enclosure outside too. It is covered and scooped regularly. I tried sticky tape around the coop area and I've caught about 6 flies (and a ladybug! ), with hundreds others buzzing around the backyard and zeroing in every time a single poop comes out of a chicken. I'm going to pick up one of those stinky traps when I get out of town tomorrow, but of course I'm worried that this could be just as bothersome to neighbors. I read about DE - does it really work on the ground, and wouldn't it kill earthworms and things like that which I need for my garden too? When the summer is over and it gets cold, do the fly eggs die? Or do they hang around and burst out again next spring? I'm wondering if I was more careful with my manure (fully composted it first this time), maybe I could start over again next year and NOT have this problem? Hrmf.