Hi, I am also a horse person, so here goes my random fly spray recipe: Larry's Fly Spray (safe for humans and dogs - supposedly it's natural) mixed with skin-so-soft and diluted with water (each component at a bout 1:5). There is also a brand called Eqyss that is all natural and has a marigold fly spray: http://www.smartpakequine.com/SearchResults.aspx?page=GRID&free_text|1213798706936=fly%20spray%20marigold&attribute_value_string|Store_ID=Equine - I didn't really like how it worked on my horse, but lots of people swear by it. I just use the Larry's and skin so soft on me, the horse, the burro and the dog. - of course I don't put it on my forehead as it would then sweat into my eyes and I would fall off my bike. How is your steel steed treating you?