FRONTLINE Shield Flea & Tick Treatment for Medium Dogs 21-40 lbs — 3 Pack

Overview

FRONTLINE Shield for Dogs is a trusted name in flea and tick protection, designed to be fast-acting and long-lasting. This 3-in-1 topical treatment combines flea and tick control with repellency against ticks and mosquitoes, offering a practical option for year-round protection. The product is formulated to provide protection for a full 30 days, making monthly use a straightforward part of your dog care routine.

What it does

The Shield formula is engineered to protect medium dogs and puppies, addressing multiple pests with a single application. It both kills and repels pests, and it’s designed to work on contact with pests while providing ongoing release through the coat. The product deposits in the sebaceous glands, creating a reservoir that helps replenish the coating over time, even if your dog gets wet.

• Proven flea and tick protection with repellency against ticks and mosquitoes
• Kills and repels all life stages of ticks, including those that may transmit Lyme disease
• Kills chewing lice and adult fleas, and stops flea eggs and larvae from re-infesting
• Convenient to use; waterproof formula protects for a full 30 days
• For dogs big and small; suitable for puppies as young as 9 weeks and weighing at least 5 pounds

Who it’s for

• Medium dogs in the 21–40 lb range
• Puppies 9 weeks or older weighing at least 5 pounds

Real-life use and feel

After application, you’ll typically notice the product spreading across the coat, creating a protective layer that helps deter pests. The feature set is designed for everyday life—whether you’re at home, on walks, or exploring trails. The refill-friendly 3-pack helps you stay prepared without frequent re-orders.

How to use and maintain protection

Apply once every 30 days to maintain protection. The waterproof nature supports outdoor activities, rainy days, and light showers as part of a normal routine. For best results, integrate FRONTLINE Shield into a regular monthly schedule and consider subscribing to simplify ongoing protection for your dog.

To learn more about compatible Frontline products and tips for protecting your pet year-round, visit the Frontline brand store and follow our product updates.