Prozap VIP Insect Spray is a ready-to-use spray to control flies, mosquitos, and gnats on horses and around the barn/stables. Containing 0.25% pyrethrins, 0.25% piperonyl butoxide and 0.50% Vapona, this formula should only be sprayed once daily on animals and surrounding areas. 
For animal use, apply 1 to 2 oz. per animal. For barn/stable use, apply 2 oz. per 1,000 cubic feet. Do not spray more than one daily.