Hartz UltraGuard Rid Worm Dewormer for Roundworms for Cats, 4-oz bottle

By Hartz
Rated 3.8269 out of 5 stars
$7.60Chewy Price
$7.62Chewy Price
$7.22Autoship Price
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Frequently Bought Together

HomeoPet WRM Clear Dewormer for Hookworms, Roundworms, Tapeworms & Whipworms for Birds, Cats, Dogs & Small Pets, 450 drops
Rated 3.8069 out of 5 stars
$14.99Chewy Price

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Total Price: $26.17

About This Item


  • Easy-to-use solution to effectively remove roundworms from your cat or kitten.
  • Can be applied directly in your paw-tner’s mouth or in her food.
  • Works on adult cats and kittens eight weeks of age or older.
  • Store treatment in a cool, dry place and avoid temperatures above 86°F.
  • Repeat treatment every 14 days for best results.

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Questions & Answers

9 Customer Questions

Does this work in tapeworms
Answer by ChewyAug 16, 2019
This feline deworming treatment is only formulated to be effective against large roundworms (Toxocara cati and Toxascaris leonina) in cats and kittens and may not effect tapeworms.

What’s the first treatment? It is several drops a day for several days or just a one day treatment?
Answer by ChewyApr 25, 2022
This easy-to-use syrup can be dropped directly into your pet's mouth or mixed into food once. The first treatment should be repeated 14 days later.

Can you put this worm medicine in their water?
Answer by ChewyAug 19, 2022
This treatment can be dropped directly into your pet's mouth or mixed into food.

can this be used on dogs to
Answer by ChewyDec 30, 2022
This treatment is specifically intended for use with cats.

ReviewsWrite a Review

Rated 3.8269 out of 5 stars
52 Ratings
Would recommend to a friend

52 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 Bones on Sep 6, 2023

My sister's cat is feeling better now!

When my older sister found out her cat Peanut had roundworms, she was in peices because she didnt have the money at the time to take him to the vet. So I looked and looked for the best and cheapest option online, then I had found out that Chewy existed, and when I looked at the reviews and price for this "Hartz UltraGuard Rid Worm Dewormer for Roundworms for Cats" and I was so happy thay I had finally found something that I could afford and help Peanut. It's been a few weeks since my sister got it, and Peanut is acting like his usual self now! P.s. I don't have a photo of it because I got it delivered to my sister's house.

Rated 5 out of 5 stars
By hartz on Sep 13, 2023


Always been a fan of hartz of the counter medication for my furs babies. Always helped in the past and still helps.

Rated 5 out of 5 stars
By Saddleup on Aug 4, 2023

Liquid cat wormer

I used this for our barn cats as we can’t touch them. It was easy to use and they were able to get what they needed.

Rated 1 out of 5 stars
By gra on Jun 23, 2023

cat will not touch it!

it was received on time but my cat will not eat the food that I have placed it on, so the vet sold me a capsule of Revolution which was easy to administer and seems to work.

Rated 1 out of 5 stars
By Ryan on Aug 28, 2023

Seal broken, Brown gunk

As the title states, the seal was open when it arrived and there is brown stuff

Rated 2 out of 5 stars
By BH on Jul 10, 2023

Not very effective for our cats

We thought it did the trick at first made sure to follow instructions and we never seen any real change after the first dose we gave them.

Rated 5 out of 5 stars
By Tracey on Sep 1, 2023

Works completely and fast

Great product, cat ate it up Two weeks, no more unwelcome "visitors"

Rated 5 out of 5 stars
By Suez on Apr 4, 2023


I rescued a feral cat from our awful winter and to my surprise gave birth to 5 kittens. Also have been feeding another stray regularly.. this product was given to kittens at 6 weeks with ease and no ill effects on these 1 & half pound cuties! Now just praying for some help .. and adoptions

Rated 5 out of 5 stars
By catprankz on May 14, 2023

Caramel taste de wormer

Forget the rest this works best to date. I’ve tried them all. Trust me on this one. If Coal eats it in her food your cat will.

Rated 2 out of 5 stars
By dewormer on May 1, 2023

Worst dewormer

This cat dewormer does not work very well and I followed directions. Will not be buying again!