Hartz UltraGuard Dual Action Flea & Tick Spot Treatment for Dogs, 15-30 lbs, 3 Doses (3-mos. supply)

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About This Item

Details

  • 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.

Ingredients

Instructions

FAQ

Learn More About Hartz From Our Team of Experts
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.

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.

Fast-Acting

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

Waterproof

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

For more than 95 years, Hartz has been dedicated to creating products that show pets the same unconditional love they give us. Hartz is a leader in quality, innovative products for dogs and cats, including Oinkies, Delectables, UltraGuard, Nature’s Shield, Home Protection, Comfitables, and Groomer's Best brands. Through the Hartz Loving Paws shelter outreach program, Hartz is committed to helping animal welfare organizations that protect and care for pets until they find their forever homes.

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Questions & Answers

1 Customer Questions

Will this wash off during a bath ? Thanks in advance

Answer by Chewy • May 25, 2021
After applying this treatment, do not allow your dog to swim or bathe for 48 hours.
Reviews
Write a Review
4.3
Rated 4.3 out of 5 stars
183 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

84% Positive

Effectiveness

78% Positive

Ingredients

87% Positive

Long-Term Benefits

74% Positive

36 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 Robert on Dec 5, 2025

Not a quality product

The contents were fine. However the plastic tips broke off. I had to throw 2 away.

The contents were fine. However the plastic tips broke off. I had to throw 2 away.

Rated 5 out of 5 stars
By Shawnene on Oct 30, 2025

Helpful

Wow what an amazing difference it was. It really cured his itching and helped him feel relief.

Wow what an amazing difference it was. It really cured his itching and helped him feel relief.

Rated 5 out of 5 stars
By Michelle on Jul 18, 2025

We Love Chewy

Chewy is excellent for getting our dog's medication. They contact your vet for you to get the prescription. Easy process and fast delivery. We also order all

Chewy is excellent for getting our dog's medication. They contact your vet for you to get the prescription. Easy process and fast delivery. We also order all of our flea prevention drops, treats and toys from Chewy. Our little Chiweenie loves her honey buffalo ears! Thank you Chewy!

Rated 1 out of 5 stars
By Emily on Sep 18, 2025

Poisoned my dog

My dog had an extreme reaction to this medicine. He became extremely lethargic and dehydrated. Led to a very scary vet visit.

My dog had an extreme reaction to this medicine. He became extremely lethargic and dehydrated. Led to a very scary vet visit.

Rated 5 out of 5 stars
By Karen on Jan 19, 2026

Killing the flea's

Don't know yet. Just used it on her

Don't know yet. Just used it on her

Rated 1 out of 5 stars
By Miyoshia on Jan 3, 2026

My dogs

Actually see less fleas

Actually see less fleas

Rated 5 out of 5 stars
By Julie on Sep 10, 2025

The easy application

Used this on all the feral cats on our farm. Works great.

Used this on all the feral cats on our farm. Works great.

Rated 5 out of 5 stars
By Betty on Sep 8, 2025

Price

Works just as well as the expensive one.

Works just as well as the expensive one.

Rated 5 out of 5 stars
By Gary on May 1, 2025

Years and years!

We’ve used Hartz UltraGuard since our first dog(1984), now on dog #3 and 4. It works and I wouldn’t change.

We’ve used Hartz UltraGuard since our first dog(1984), now on dog #3 and 4. It works and I wouldn’t change.

Rated 1 out of 5 stars
By William on Jun 16, 2025

Unhappy

The topical flea and tick treatment doesn't work as advertised.

The topical flea and tick treatment doesn't work as advertised.