Professional strength pest control contains more of the two most important active ingredients essential for rapid knockdown, kill and repellency - 0.2% permethrin and 0.1% pyrethrins. Kills and repels 70+ species of pests, including all the common species of flies, plus hard-to-kills such as scorpions, black widow spiders, spiders, ticks, lice, gnats, cockroaches and mosquitoes, including Culex species mosquitoes which are known to transmit the West Nile Virus. Effectiveness lasts for 7-14 days after initial treatment period. Contains no oily petroleum distillates to irritate or attract dirt and dust on the coat. Approved for use everywhere you and your horse might encounter pests -- in the stall, around the barn or outside. Can be used on dogs and puppies over 12 wks old.