Okay so our flies disapeared a bit but now they are back and have multiplied about 100 times! We have fly traps up, and bug zappers (on at night) outside. And fly strips inside the barn. W efly spray our horses with the only stuff we found that works. And we kill about 200-500 every night with fly swatter but the next day our horses will have tons near then and they are everywhere again. We fill their water up everyday and they always have a round bale.
Any other ways to kill them? We want to kill not shoo away because they always come back. We just want to get rid of them for our boys so they can be out all day with out getting bothered by flies