Hartz UltraGuard Dual Action Flea & Tick Spot Treatment for Dogs, 15-30 lbs

By Hartz
Rated 3.1765 out of 5 stars

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$5.88 Chewy Price
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$5.59Autoship Price

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About This Item


  • This topical formula is designed to protect your canine companion against fleas and ticks including brown dog ticks and deer ticks.
  • One application of UltraGuard Dual Action formula keeps your pal protected from pesky pests for up to 30 days.
  • Tick and flea solution may also prevent re-infestation for the convenience of both pets and pet parents alike.
  • UltraGuard Dual Action treatment breaks the flea life cycle so that your dog can continue to do what he loves.
  • This topical solution is suitable for dogs between 15-30 pounds and comes with 3 monthly treatments.

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Important Information

Fleas rise to the top of your pet's coat as they die, so consider it a triumph if you start seeing more fleas at first, after treating your pet. If you’re still seeing fleas after application, it may be because your pet has picked up new fleas from the environment, which may include other pets, surfaces and outdoor areas. It may take up to 30 days to break the entire flea life cycle. Additionally, you should also treat sources of new fleas (i.e., carpet, yard, etc.) to ensure complete flea control.

Frequently Bought Together

About Hartz UltraGuard Topicals for Dogs

Why Choose a Flea & Tick Topical?

Hartz UltraGuard topicals provide monthly non-stop flea and tick protection. Just apply directly to your dog’s skin—they’re fast-acting and help prevent reinfestation for up to 30 days!

How Hartz Flea & Tick Topicals Work

Hartz UltraGuard topical formulations utilize your dog’s natural oil composition to spread their active ingredients across the skin. Once applied, the monthly formula moves across the skin and hair for full body protection.

How to Apply Hartz Flea & Tick Topicals

Step 1: Open the package and remove one tube.

Step 2: Break the seal by twisting the dispenser tip while pushing down.

Step 3: Position the dispensing tip on your dog’s back between the shoulder blades.

Step 4: Apply the topical directly to the skin, from the shoulders to the base of the tail.

Monthly Flea & Tick Protection

Pest Protection

Hartz UltraGuard dog topicals help kill and prevent fleas and ticks for up to 30 days, offering full-body protection.


Once applied, UltraGuard topicals start killing fleas in as little as 15 minutes.


UltraGuard offers full waterproof protection for 48 hours after application, so it keeps working even if your dog gets wet.

Pro-Glide Applicator

Hartz UltraGuard PRO Topical has a specially angled applicator for easy, mess-free application.

About Hartz

Hartz has been delivering exceptional pet care products for over 95 years. The full range of pet care products are dedicated to the health and well-being of cats and dogs with a focus on making life with pets richer, easier, and more joyful.

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Top IngredientsActive Ingredients: Etofenprox 55.0%, Piperonyl Butoxide (PBO) 10.0%, n-octyl bicycloheptene dicarboximide (MGK 264) 1.0%...Active Ingredients: Etofenprox 55.0%, Piperonyl Butoxide (PBO) 10.0%, n-octyl bicycloheptene dicarboximide (MGK 264) 1.0%...Active Ingredients: Etofenprox 55.0%, Piperonyl Butoxide (PBO) 10.0%, n-octyl bicycloheptene dicarboximide (MGK 264) 1.0%...Fipronil, (S)-methopreneFipronil, (S)-methoprene
LifestageAdultAdultAdultPuppy, AdultPuppy, Adult
Breed SizeSmall BreedsSmall BreedsMedium BreedsMedium Breeds, Large BreedsLarge Breeds, Giant Breeds

Questions & Answers

1 Customer Questions

Will this wash off during a bath ? Thanks in advance
Answer by ChewyMay 25, 2021
After applying this treatment, do not allow your dog to swim or bathe for 48 hours.

ReviewsWrite a Review

Rated 3.1765 out of 5 stars
17 Ratings
Would recommend to a friend

13 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 1 out of 5 stars
By Bianca on May 24, 2023

Does not work!

Put this on my dog about a week ago, she is still itching like crazy and now I am starting to get bit! This product is not effective.

Rated 5 out of 5 stars