Originally Posted by DejaVu
It's not a must, but it really depends on your climate, and how bad the flies are at the time.
Have you tried Pyranha? It definitely works the best, in my area anyways.
In my area, the flies are controllable, with spray, fly traps, and predators. There's still some buzzing around, but the Pyranha is the final coating to keep them away from the horse.
So, leaving some hair out, would be kind, but not required.
yeah, we go through every brand.
We have fly traps and predators (for 500+ horses but we only have 30)