FRONTLINE Shield Flea & Tick Treatment for X-Large Dogs (81-120 lb) — 6 Doses

Powerful flea and tick protection for large dogs

FRONTLINE Shield for Dogs is the fastest working FRONTLINE product. It provides proven flea and tick protection with repellency against ticks and mosquitoes, helping your dog stay safer during daily adventures and outdoor excursions. After applying, the treatment spreads quickly across your dog's body and settles into sebaceous glands, forming a reservoir that continues to replenish protection even if your dog gets wet. A monthly application keeps coverage consistent throughout the year, whether you are at home, on walks, or exploring new trails.

What it does for your dog

• Proven flea and tick protection with repellency against ticks and mosquitoes.
• Kills and repels all life stages of ticks, including those that may carry diseases.
• Kills fleas at all life stages and chewing lice; helps prevent re-infestations.

Easy to use and long-lasting

The topical formula is easy to apply and is waterproof for at least 24 hours after application, delivering protection for a full 30 days. It is suitable for large and small dogs alike and is effective for puppies as young as 9 weeks and weighing at least 5 pounds.

• Waterproof for 24 hours after application, so outdoor play doesn’t interrupt protection.
• Monthly protection helps you plan and maintain coverage through all seasons.

Why owners choose FRONTLINE Shield

After application, the treatment rapidly covers your dog's entire body and deposits in sebaceous glands. This reservoir continuously replenishes the protection, giving you confidence whether you are inside, walking neighborhoods, or spending time on trails. If you like convenience, subscribe and save to stay protected year-round while you focus on time with your dog.

Real-world use cases

Active dogs who spend long days outdoors, swimmers who enjoy water days, or households with multiple dogs can benefit from a reliable, month-to-month protection plan. The 30-day window aligns with monthly routines, making it easier to manage during busy seasons.