Works wonderfully for my mom's gelding, but gives mine hives. I just recommend doing a test area first. I had a separate fly spray, but I ran out and my mom covered my horse in the Pyrannha without testing it. Poor boy was covered in hives and rolling/itching his mane out for a few days after a rinse.
Works great for the other gelding though. I would recommend it! For any spray you try, I would do a test first, to be safe.
"Putting pads on a gaited horse is like putting a mask on a beautiful woman."