HARTZ UltraGuard Pro Reflecting Flea & Tick Collar for Dogs & Puppies, 2 Collars (14-mos. supply) - Chewy.com

Hartz UltraGuard Pro Reflecting Flea & Tick Collar for Dogs & Puppies

By Hartz
Rated 3.1214 out of 5 stars

$14.87Chewy Price
$14.13Autoship Price
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About This Item


  • Provides full body protection from fleas and ticks for up to 7 months and can kill and even prevent flea eggs for up to 7 months—stopping the flea life cycle to help prevent reinfestation.
  • For dogs and puppies 12 weeks of age and older.
  • Water-resistant, continues to fight fleas, protecting your pet no matter the weather.
  • Reflects direct light for up to 450 feet for nighttime safety.
  • Proudly made in the USA of domestic and imported materials to protect your companion from pesky fleas, flea eggs and ticks.

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Play Video: Learn More About Hartz From Our Team of Experts
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.

Questions & Answers

20 Customer Questions

How long does it take for the collar to work? And how do i know if its working?
Answer by ChewyDec 07, 2018
The collar will begin to kill fleas, ticks and flea eggs and larvae immediately. Its full protections against harder to kill ticks will be built up within a few days after being placed on the pet.

Can this be used on dogs with sensitive skin
Answer by ChewyOct 29, 2018
If your dog's skin is sensitive, please ask your veterinarian if this treatment is right for them.

I have 2 cats also. Is this collar safe for my cats if my dog wears it?
Answer by ChewyAug 02, 2018
When used as directed this collar is safe to use in multi-pet households.

How often do I have to change the collar to my pet?
Answer by ChewyFeb 20, 2019
This collar should be changed every 7 months.

ReviewsWrite a Review

Rated 3.1214 out of 5 stars
173 Reviews
Would recommend to a friend

173 Customer Reviews

Filter by reviews that mention

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 Emma on Mar 7, 2023

bad review here

I’ve always used Soresto collars I’ve never had any problems with the fleas. Due to the cost, I decided to try these flea collars, my dogs ended up with fleas. I bathe my dogs every week. Thank goodness. I’m going back to. SORESTO collars

Rated 1 out of 5 stars
By nope on Jun 19, 2022

Hartz flea collar

I purchased these collars on June 6th and it is June 18th. I have used the Seresto collars for years with no issue what so ever. With the way things are today I was trying to save a few dollars…big mistake! I noticed a my girl started scratching at her neck a few days ago. Today I looked under her collars, and to my surprise I saw this. She has a smaller sore on the top of her neck and another on the side. All of this within a week. I would not recommend this to anyone and definitely will not be repurchasing. I guess the saying is true..you get what you pay for.

Rated 2 out of 5 stars
By Jess on Sep 2, 2022

allergic reaction

My dog Abbie had an allergic reaction to this collar. As soon as we took it off she stopped itching.

Rated 1 out of 5 stars
By Puppy on Jul 10, 2022


I always had good results with Chewy.com but, this flea collar is a TOTAL WASTE of money! Used as directed, It did NOTHING for my chihuahua. I DO NOT recommend this product!

Rated 1 out of 5 stars
By Piddle on May 31, 2022

Doesn't work

Doesn't work.. Actually have fleas now! Followed directions and will go back to Seresto flea collars...

Rated 5 out of 5 stars
By Judy on May 16, 2022

Great protection

Received just before going on a road trip. Felt very confident she was protected

Rated 5 out of 5 stars
By tickandflea on Apr 17, 2022

excllent price

great product at an excellent price. And you know chewy they are very prompt getting them to you.

Rated 5 out of 5 stars
By WendiLouQ on Mar 18, 2022

Great collars!

Within a day of putting this collar on my dog, a tick was found in my bed that had fallen off of him. This collar works great!

Rated 5 out of 5 stars
By Cookie on Mar 23, 2022

good alternative

My dogs are allergic to products like Frontline. These collars work, and dogs have no bad reaction.

Rated 1 out of 5 stars
By Awesome on Feb 27, 2022

Doesn’t work

I am currently fighting fleas and this did absolutely nothing but waste my money. Let the fight continue!!