FRONTLINE Shield Flea & Tick Treatment for Dogs, 21-40 lbs, 6 Count (Box)

Starts killing fleas in 5 minutes and starts killing ticks in 1 hour. 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 Prevents all flea stages from developing to help prevent re-infestation Aids in the control of Sarcoptes mite infestations Keeps protecting your dog for a full 30 days FRONTLINE