My old horse has a nice stable in the field he shares with his friend. Both their stables are lined, have rubber matting and shavings on top of that and are kept open for them to come and go as they please. Why, then, does the silly old sod sleep flat out in the snow? It's not that he doesn't...
Yes, I was given an American product to try - Tri-Tec 14. It absolutely positively does work with horse flies - only two drawbacks, it's not yet passed for sale in this country and when it is it's likely to be expensive, at @ £25 a bottle, but it is absolutely worth it. It doesn't stink...