I have put up fly ribbons around my coop and bought a few types of Vanilla air freshers. I have to say it sounds crazy, but I had success with the vanilla tree car air fresher, not so much with any of the others. I put it around the latch of the door to their run, away from where they could peck at it. My fly trap has started to work today too! It was the first day I could smell it so maybe it took awhile to get going. There are less flies this evening than previously. The monsoon storms are going to go away for a bit so they yard should have time to dry as well. Still have a number of them, but hopefully things will continue to improve!