I keep a zip lock bag of water and cut up pieces of tin foil on the door of my coop. I rarely ever see flies and I attribute it to the bag. Something about the foil, water and reflections it creates from sunlight scare them away. I do sprinkle the coop once a week with Diatamaceous Earth.
For the flies that get in my house I bought an electric fly swatter at Walmart for 6 dollars, and man does it kill them! If you had a lot of flies in your coop and wanted to kill them quick and easy it sure would do it! I found it in the garden department.
[=http://www.walmart.com/ip/Zap-Master-Handheld-Electric-Bug-Zapper/19530536][/]
For the flies that get in my house I bought an electric fly swatter at Walmart for 6 dollars, and man does it kill them! If you had a lot of flies in your coop and wanted to kill them quick and easy it sure would do it! I found it in the garden department.
[=http://www.walmart.com/ip/Zap-Master-Handheld-Electric-Bug-Zapper/19530536][/]