HARTZ UltraGuard Flea & Tick Collar for Dogs, up to 26" Neck, 1 Collar (7-mos. supply) - Chewy.com

Hartz UltraGuard Flea & Tick Collar for Dogs, up to 26" Neck, 1 Collar (7-mos. supply)

By Hartz
Rated 2.6 out of 5 stars

New Customers Only: Spend 49+ Get $20 Off With Code: WELCOME

$3.58Chewy Price
$5.18Chewy Price
$3.40Autoship Price
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About This Item


  • Can combat both fleas and ticks for up to 7 months, giving your pal the long-lasting protection she needs.
  • Water-resistant collar continues to fight fleas when wet.
  • Kills through contact—eliminates fleas and ticks.
  • This collar is designed for large dogs.
  • Proudly made in the USA.

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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.

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ReviewsWrite a Review

Rated 2.6 out of 5 stars
10 Reviews
Would recommend to a friend

10 Customer Reviews

Show reviews that describe

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 Georgiaoutlaw10 on Jan 17, 2023

Flea collar

Better than expecting it seems to be working as described

Rated 1 out of 5 stars
By Faye on Sep 9, 2022

Poor Quality

I purchased the flea collar and it didn't not work... fleas were still bad and there was no type of improvement. Would not recommend.

Rated 1 out of 5 stars
By GrammaK on Jul 1, 2022

Hartz flea collars

Don't believe the hype. I have 5 cats and 5 dogs and thousands of fleas!!!! It does not work!!!

Rated 5 out of 5 stars
By Mike on Apr 24, 2022

Great product. Perfect service!

The product is just what I needed and the delivery was much faster than I had expected. I would definitely buy from Chewy again!

Rated 1 out of 5 stars
By Curls on Oct 29, 2021

Don’t work

Wouldn’t recommend. Doesn’t kill fleas. Doesn’t even later 7 months, more like 2 days. Have to give my dogs baths almost every week. Please don’t get.

Rated 1 out of 5 stars
By Chase on Sep 7, 2021

Take action now

Horrible I put this collar on my dog and it completely burnt around his neck where the collar was I'm very disappointed in will never buy this again.

Rated 1 out of 5 stars
By Katy on Aug 11, 2021

Irritates the skin

Doesn't seem too bad on my dog with tons of fur but my baby with short hair was irritated right away. :(

Rated 1 out of 5 stars
By Seresto on Apr 23, 2021

It doesn’t work

Got this as a deterrent for my poor 9 week old baby because he keeps getting fleas and it didn’t work it’s been 2 weeks and he’s still infested. We switched to Seresto and are currently watching them drop dead within hours of putting it on him

Rated 5 out of 5 stars
By Mac1 on May 10, 2021

It works, I'm glad

It does its job like it should. Scent is pleasant and my dogs are tick and flea free.

Rated 5 out of 5 stars
By LDickey on Apr 18, 2021

Satisfied with purchase

Very happy with collar so far. No ticks or fleas to be found and great price