Flax Meal and tie some insecticide ear tags in her main and tail. They will keep the nasty bugs from enjoying her funky skin
. Tie one at the top of her tail, one near her poll, and another half way down her mane. They're cheap, and it works. Tractor Supply Company - Insecticide Ear Tags
Feed 1/2 - 1 cup of flax meal a day. Your feed store should carry it, or buy Omega Horseshine.