Prozap Screw Worm and Ear Tick Aerosol is a ready-to-use aerosol spray built around a permethrin-based formula for treating superficial wounds and ears on livestock. The can includes a violet marking dye so treated wounds and animals are easy to identify, helping ensure even coverage across a herd. It is intended for beef and dairy cattle, sheep, goats, hogs and horses, including use during common husbandry procedures such as castrating, docking, branding and dehorning where open wounds can attract flies. For ear ticks, the nozzle allows direct application into the ear canal. The product is not intended for use on deep wounds, and label directions should be followed for hold distance and spray duration. Each can is designed for straightforward, no-mix application directly from the container.