Flea & Tick Protection by FRONTLINE for X-Large Dogs, 81-120 lbs., Pack of 6

FRONTLINE Shield, from the #1 name in flea and tick defense, provides proven flea and tick protection with repellant action against ticks and mosquitoes. Destroys and repels all stages of ticks, including those that may transmit Lyme disease. Repels mosquitoes that may cause heartworm disease. Kills chewing lice and adult fleas, flea eggs and larvae to prevent re-infestations. Convenient to use, easy to apply, waterproof formula protects for a full 30 days. Effective for dogs big and small; suitable for puppies as early as 9 weeks and weighing at least 5 pounds.