Zonk-It! 35 is Insect control spray for horses and dogs with 35-Day residual protection, enriched with lanolin and aloe vera for sensitive skin. Zonk-It! 35’s water-based formula offers lasting repellency. Protects against horn, face and horse flies, mosquitoes and gnats. Kills lice and louse eggs, ticks & fleas. Gentle baby powder fragrance. Contains 0.5% permethrin.