Join Date: Dec 2010
Location: southern Arizona
My experience is the same. It doesn't completely eliminate the flies, but it makes a noticeable difference - maybe 50-70% fewer? My horses get it when I start noticing flies, and it takes 1-2 weeks to get the maximum out of it. In southern Arizona, I usually start end of March or so and continue until Thanksgiving.
... Energy is an admirable thing, but the energy of stupidity seldom avails much..." - On Seats and Saddles (1868), Francis Dwyer, Major of Hussars (light cavalry)