Jill, is right..the concentrated fly control that is sold at most feed supply stoores works about the best. I am done in the barn for the night but I will look tomorrow what the name is on ours. We use it for the arabians, minis, donkeys goats and the cattle. I cant really say it works any better then most of the expensive brands...which in my honest opinion dont work all that great either, but it does at least keep the flies away for awhile, and the cost is very reasonable, compared to the expensive stuff. Bronco dont work worth a crap, you might as well just spray them with plain water. I have never seen it work for more then a few hours. Avon Skin so soft is suppose to work so good too..I dont think that works either. As for home remedies, the best I have seen is Dawn dish soap (the original blue )cider vinegar and water, just mix equal parts of it and shake good , put in a sprayer bottle and spray, for a homemade horse wipe (for like the ear area etc) mix equal parts of peppermint mouthwash and baby oil, and wipe it on. These homemade ones wont last real long either, but they work just about as good as some of the commercial wipes or sprays. Dont you just hate fly season??
Corinne