Fly tape strips work well. We clean our coop completely every 2-4 days but the flies love the chicken feed. I placed two fly tapes in coop and they were loaded with flies in two days. I also put some diatnacious earth on floor. I was told later to not use it but it worked well and flies were gone in a day or two. Now no more fly issues just frozen water issues, winter is here.

Don't like fly traps (tried it once) it sure smells ... fly tape is great IF location is right ...
haven't had any issues with flies.

There are "feral" chickens running around, the island of Kauai is over run. I'm sure they escape & alot are dumped in when people tire of them. My Mom's neighborhood has a few domesticated breeds running around but it's mostly the Game (fighting) Chickens. It's illegal but we do have Cock Fighting here, cultural thing with some that have moved over
