Hartz UltraGuard Dual Action Flea & Tick Spot Treatment for Dogs, 5-14 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 5-14 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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Frequently bought together

Questions & Answers

3 Customer Questions

I had just bought this product for my dog she's 9 years old and I had submit the medicine on to her my question is how long does it take for it to work cuz right now what I see is not working

Can I use this on my rabbits

Answer by Chewy • Aug 11, 2021
This treatment is intended for dogs and should not be used on rabbits.

Is Ultra guard safe to use with Trice Heart med?

Answer by Chewy • Jun 20, 2021
We recommend consulting with your veterinarian before combining any flea and tick treatments/preventatives or medications.
Reviews
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4.2
Rated 4.2 out of 5 stars
200 Ratings
Terms & Conditions

Customers Mention

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

Ease of Use

61% Positive

Effectiveness

66% Positive

Ingredients

75% Positive

Long-Term Benefits

65% Positive

46 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 5 out of 5 stars
By Pearly on Dec 30, 2025

You are speedy!

Its like I order and its here fast. Thank you! The dogs and I appreciate being able to depend on you for their needs!

Its like I order and its here fast. Thank you! The dogs and I appreciate being able to depend on you for their needs!

Rated 5 out of 5 stars
By DANIELLE on Sep 24, 2025

The prices

I have used only this brand for my dog for years from my senior chihuahua Lola who passed away at 15 to now my Brussel griffon who’s 9months and on nextgard plus

I have used only this brand for my dog for years from my senior chihuahua Lola who passed away at 15 to now my Brussel griffon who’s 9months and on nextgard plus one can necer be to careful I LOVE YOU HARTZ

Rated 1 out of 5 stars
By Good Sis on Aug 29, 2025

Do not recommend!

I have 2 yorkies and I tried this new for flea prevention, my oldest yorkie is 12 lbs and this burned her skin... she has scabs where I applied this down her back

I have 2 yorkies and I tried this new for flea prevention, my oldest yorkie is 12 lbs and this burned her skin... she has scabs where I applied this down her back. My other 6 lbs yorkie is okay and wasn't burned. This formula is also very greasy.

Rated 5 out of 5 stars
By Jennifer on Aug 11, 2025

It keeps the bad bugs away!

Lady loves being able to have Free Roam outside when it's not too cold or too hot and it's 1 less thing for her to worry about when it comes to once per week groomings

Lady loves being able to have Free Roam outside when it's not too cold or too hot and it's 1 less thing for her to worry about when it comes to once per week groomings. She is an elderly longhaired Chihuahua and she gets matted up eaasily. Ticks and Fleas do not need to be added to the mix!

Rated 1 out of 5 stars
By Jim on Aug 24, 2025

Just didn't work

We tried for 3 months with our two small pugs, and it seemed like they killed the fleas for 1-2 days maybe, but then they came right back. None of the promised

We tried for 3 months with our two small pugs, and it seemed like they killed the fleas for 1-2 days maybe, but then they came right back. None of the promised prevention.

Rated 1 out of 5 stars
By rebecca on Jun 1, 2025

DO NOT BUY THIS MEDICINE!!!!

I bought this medicine for my 2 year old yorkiepoo due to her needing flea medicine and I used as directed on the pack. And a day later I was rushing her to my emergency

I bought this medicine for my 2 year old yorkiepoo due to her needing flea medicine and I used as directed on the pack. And a day later I was rushing her to my emergency vet due to her getting extremely sick from using this medicine!! The vet had told me that this medicine should had already been taking off the market due to many animals getting extremely sick and/or dying from using it. So I advise anyone thinking about ordering Hartz medicine to not and buy something different. I know i will not buy this medicine again for any of my animals, I love them to much to put any of them threw that ever!!!!!!!

Rated 5 out of 5 stars
By Pam on Dec 10, 2025

Mom's dogs

Got this to help her dogs

Got this to help her dogs

Rated 5 out of 5 stars
By Segundo on Sep 27, 2025

Qick delivery

I've purchased this before. It's great.

I've purchased this before. It's great.

Rated 5 out of 5 stars
By Ashley on Apr 18, 2025

This is by far the best topical treatment for dogs to safeguard them against flea and ticks. Not to mention delivery was very rapid and I couldn't be more pleased

This is by far the best topical treatment for dogs to safeguard them against flea and ticks. Not to mention delivery was very rapid and I couldn't be more pleased thanks chewy

Rated 1 out of 5 stars
By Angelina on Apr 25, 2025

I was very unhappy because I only received 2 of the 3 I ordered. I have three dogs and now one of my dogs won't be protected

I was very unhappy because I only received 2 of the 3 I ordered. I have three dogs and now one of my dogs won't be protected