Hartz UltraGuard Pro Flea & Tick Collar for Cats, 1 Collar (7-mos. supply)

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About This Item

Details

  • Repels and kills fleas, ticks, flea eggs and flea larvae and helps prevent flea eggs from hatching for up to 7 months!
  • The reflective strip reflects direct light up to 450 feet to help keep your paw-tner visible.
  • Water-resistant, so you don’t have to worry about your outdoor cat getting caught in a sudden rain shower.
  • Has a breakaway, safety release snap that makes the collar come undone in case your kitty accidently gets caught on a branch or other object.
  • For cats 12 weeks of age and older.

Ingredients

Instructions

Size

Learn More About Hartz From Our Team of Experts

About Hartz Ultraguard Cat Collars

Why Choose a Hartz Flea & Tick Collar?

Hartz Flea & Tick Collars provide convenient, mess-free flea and tick protection that is easy to put on and adjust for comfort. These flea and tick collars protect for up to 7 months, and they can be worn alongside your cat’s regular collar.

How Hartz Flea & Tick Collars Work

Hartz Flea & Tick Cat Collars contain active ingredients that are slowly released and spread over your cat’s body. These active ingredients kill and repel fleas and ticks to keep your cat pest-free and happy.

Long-Lasting Flea & Tick Protection

Pest Protection

Hartz UltraGuard cat collars kill and repel fleas and ticks and can be worn with your cat’s regular collar.

Full Body Protection

The active ingredients spread across your cat’s skin, providing continuous, full-body coverage for up to 7 months.

Breakaway Design

A breakaway release snap helps keep the collar from getting caught on things like branches and fences for safety.

Don’t Settle for Stiff

Hartz UltraGuard ProMax is a soft and flexible flea and tick collar that will keep your cat comfortable and protected.

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

2 Customer Questions

Where are the Hartz flea and tick collars made, USA?

Answer by Chewy • Jun 06, 2022
This collar is manufactured in the United States.

Can a pregnant cat wear one of these?

Answer by Chewy • Apr 13, 2020
If used on pregnant or nursing cats, do not replace collar until the kittens are at least 12 weeks old. Consulting a veterinarian before using this product on a debilitated, aged, medicated, pregnant, or nursing cat.
Reviews
Write a Review
4.0
Rated 4 out of 5 stars
490 Ratings
Terms & Conditions

Customers Mention

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

Active Ingredients

60% Positive

Duration of Protection

61% Positive

Effectiveness

64% Positive

Safety

63% Positive

124 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 Elliott on Dec 1, 2025

This had to be a repackaged flea collar !!!!

Got the package yesterday, opened it up and it looked used, it looked old, it looked like it missing a part to it as well. im about to ask for a replacement ,

Got the package yesterday, opened it up and it looked used, it looked old, it looked like it missing a part to it as well. im about to ask for a replacement , ill give them a second chance, because i have ordered other products that were as advertised. but i will not put this on my pet .

Rated 2 out of 5 stars
By Naima on Jan 16, 2026

Yeah, right

Either I got the most stubborn fleas ever; or these collars worked as badly as every flea drops I’ve tried before. Fleas were gone for a week after bath day, but

Either I got the most stubborn fleas ever; or these collars worked as badly as every flea drops I’ve tried before. Fleas were gone for a week after bath day, but back again soon after.

Rated 1 out of 5 stars
By Joely on Dec 13, 2025

Don’t purchase

I put it on my cats and they started throwing up and not eating much. Every time they eat, they throw up. Also, they seem kind of depressed. I would definitely not

I put it on my cats and they started throwing up and not eating much. Every time they eat, they throw up. Also, they seem kind of depressed. I would definitely not recommend buying.

Rated 1 out of 5 stars
By Danielle on Dec 17, 2025

Did not work

They have had these on for a while now and they have not worked at all. Didn't even make a slight difference.

They have had these on for a while now and they have not worked at all. Didn't even make a slight difference.

Rated 5 out of 5 stars
By Evan on Dec 16, 2025

Flea Be Gone

It’s been warm and dry,perfect weather for fleas. The collars helps me keep the pesky pests at bay.

It’s been warm and dry,perfect weather for fleas. The collars helps me keep the pesky pests at bay.

Rated 1 out of 5 stars
By Nancy on Jul 28, 2025

Lots of FLEAS!

I put this collar on my cat 07/02/25. I kept wondering why she was scratching so much during the following two weeks and thought she may have had allergies. I was

I put this collar on my cat 07/02/25. I kept wondering why she was scratching so much during the following two weeks and thought she may have had allergies. I was so wrong! My office and other areas of house are now full of fleas! I followed the directions and stretched her collar before putting it on her. One star rating is more than this product deserves. I would like to be reimbursed. Thank you.

Rated 1 out of 5 stars
By Susan on Oct 3, 2025

Hertz Mountain

I thought that being Hartz Mountain the collars would be helpful. They did not even begin to work. Would not buy again. But Chewy is still my store for pets.

I thought that being Hartz Mountain the collars would be helpful. They did not even begin to work. Would not buy again. But Chewy is still my store for pets.

Rated 5 out of 5 stars
By eleni on Oct 17, 2025

Great product for a great price

It’s a great product and you can find a better price for this kind of collar. Also, chewy service is unbeatable!

It’s a great product and you can find a better price for this kind of collar. Also, chewy service is unbeatable!

Rated 5 out of 5 stars
By Crystal on Oct 29, 2025

Cheap But Effective

I buy 2 of these every year for spring to fall and my six year old has never had fleas.

I buy 2 of these every year for spring to fall and my six year old has never had fleas.

Rated 5 out of 5 stars
By Robin on Aug 31, 2025

No ticks or fleas

I like the reflector tape because my 2 boys like to go out briefly before bed every night. Been using for 2 years. Flea and tick free.

I like the reflector tape because my 2 boys like to go out briefly before bed every night. Been using for 2 years. Flea and tick free.