Homemade fly & gnat spray for horses. When I sprayed it on the horses, the bugs just fell off. It said it was for flies, gnats, ticks, mosquitoes and for fleas & ticks on dogs & cats: 1 gallon water, 1 gallon vinegar, 1/4 cup dawn, 1/4 cup veg oil and about 2 tbsp peppermint extract