Frontline Shield Flea & Tick Treatment for Small Dogs 11-20 lbs. 3pkStarts killing fleas in 5 minutes* and starts killing ticks in 1 hour*. If this claim is displayed on any webpage, it must include the * as well as the following footnote: *Starting two days after application Repels mosquitoes that may transmit heartworm disease Kills and repels all stages of ticks, including ticks that may transmit Lyme disease Kills and repels stable flies Kills adult fleas, flea eggs & larvae and chewing lice Frontline Shield 3Pk