At my shoer's recommendation I am using Country Vet CVD-80 as a premise spray & on the horses.
If anyone knows how to get rid of flies, a shoer would be the one!
$12.95 (this year) at
TSC for a 25oz aerosol - lasts me about 2 weeks on one horse, one pony plus the stalls, barn aisle, etc.
Sometimes I spray ME if the biting flies/mosquitos are especially hungry.
I don't use it every day, but when I do I concentrate on their topline, legs & tail (their flyswatter).
For faces & ears I spray it on a sponge and apply that way.
I also spray the outside of their flymasks if the pests are really bad in pastures.
Stomping & headshaking in stalls & pastures is greatly reduced.
I don't dump my wheelbarrow/muck bucket every day, but if I spray that as well it keeps flies off the "stuff".
Active ingredient is .50 pyrethin
For those worried about chemicals: pyrethin is an organic insecticide derived from chrysanthemums