MTG for mane rubbing
My horse rubs his mane all the time, straight down to the skin. I use MTG, and it is AWESOME. It promotes new hair growth, and I have now discovered that it also repels the gnats. My horse is allergic to the saliva of the gnats and no-see-ums, flying around. So you can look all you want, but you will not see the fleas or gnats anywhere on your horse. Since I have started using the MTG, my horse has stopped rubbing, and his mane is growing back!