go to tractor suppy TSC. get a fly trap plastic bottle with black lid that pops up.about $5. use the supplied phermone. add water. put in sun on ground. catch MILLIONS of flies. bury them around garden?pasture?reset trap!! or use a farnam fly terminator trap, or "Big stinky" brand trap. they all work around chickens, cows, dogs!! couldn't survive without them around here!!