Interesting!I heard that those tree air fresheners in vanilla scent help get rid of flies in coops.
I put up a couple of these fly traps away from the coop:
You don't want them near your house or porch. The stink like rotten meat/eggs. I have removed thousands of flies with these traps.
. Awhile back on the news that Thailand and Cambodia are at war, then settled, then started again. That is something to think about...avoid the borders.