Equine and Dog Insect Control Spray Zonk It! 35™ insect control spray provides long-lasting protection from face flies, horseflies, horn flies, mosquitoes and gnats. Kills fleas, ticks, lice and louse eggs Gentle, water-based formula with aloe vera and lanolin for sensitive skin Safe for horses and dogs Zonk It! 35 insect control spray contains 0.50% permethrin