ONGUARD PLUS Flea & Tick Spot Treatment for Dogs, 23-44 lbs, 6 Doses (6-mos. supply) -

Onguard Plus Flea & Tick Spot Treatment for Dogs, 23-44 lbs

By Onguard Plus
Rated 3.4384 out of 5 stars
Pet Weight
Pet Weight

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$31.97Chewy Price
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About This Item


  • Contains the same two active ingredients as the leading national topical flea and tick brand.
  • Topical treatment kills all life stages of fleas and ticks on dogs at least eight weeks old and ranging from 23 to 44 pounds. Helps control infestations of chewing lice and sarcoptic mange mites.
  • Helps break the flea life cycle and rids your dog of flea eggs, larvae, pupae and adults. Also kills tick larvae, nymphs and adults.
  • Effective against fleas that cause flea allergy dermatitis as well as brown dog ticks, American dog ticks, lone star ticks and deer ticks that may carry Lyme disease, when used as directed.
  • Redesigned applicator makes it easier to apply this long-lasting and waterproof treatment that provides protection even after your dog has a bath, or gets wet from the rain or plays in water.

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Learn More About Onguard Plus From Our Team of Experts

Questions & Answers

7 Customer Questions

Is this safe for older dogs?
Answer by ChewyApr 21, 2021
This flea treatment is appropriate for dogs 8 weeks and older within the weight specified on the packaging (for this treatment, 23-44 lbs)

Does this help repel mosquitoes?
Answer by ChewyMar 23, 2021
This treatment does not repel mosquitos.

Is this Vet Recommended?
Answer by ChewyMar 14, 2021
This Flea and Tick Treatment does not require an approval from a veterinarian.

Will this product keep flies from biting their ears
Answer by ChewyAug 02, 2021
This treatment is designed to be effective against fleas that cause flea allergy dermatitis as well as Brown dog ticks, American dog ticks, Lone Star ticks and Deer ticks that may carry Lyme disease.

ReviewsWrite a Review

Rated 3.4384 out of 5 stars
73 Ratings
Would recommend to a friend

73 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 Fran on May 24, 2023


Love getting products from Chewy! Best choices, best products, best service.

Rated 2 out of 5 stars
By Chelsea on Nov 14, 2022

Bloated ticks found on both dogs

It's been unseasonably warm in CT for the middle of Nov so we've had a mini-tick boom. I bought Advantix, not realizing it was fleas only & I didn't want to spend another $50, so I bought this 23-44lb 3 pack for my 40lb Cattle dog and 25lb Terrier mixes. I combed through both their fur to make sure they were tick free and applied each of their doses to the skin at the base of their necks. About 5 days later I've pulled a bloated tick off each of them. The drops seem to be working for other people, but I was nervous that it was too good to be true for the price. Well, it definitely hasn't worked for us yet. Maybe it'll take a few more days. We'll see. But so far, no luck. I put "no" on "would you recommend to a friend?" But as of right now I'm not sure. I guess we'll give it another couple of days.

Rated 5 out of 5 stars
By Crystal on Feb 21, 2023

Great Service

The order came in so fast I was surprised. Always quick service and good prices.

Rated 2 out of 5 stars
By Pash on Aug 17, 2022

Dog got fleas for the first time ever 2 days after using this the first time

My vet recommended I stick with Simparica Trio or use Nexguard for fleas. I wanted to use something a little less invasive and try out a topical treatment. My mistake. My poor dog got fleas for the first time ever not 2 days after using this for the first time :( I guess the low price of this wasn't worth it. Also, after some research, though this is the same active ingredient as Frontline, Frontline has been on the market for over 10 years and most ticks are resistant to these ingredients now. Chewy refunded me thankfully but I won't use this again.

Rated 2 out of 5 stars
By Debbie on Nov 9, 2022

protect did not work

I live in Ga and with my 3 rescue dogs this did not work. Might be the area because we don't get cold weather to kill fleas and summer months very hot

Rated 5 out of 5 stars
By lrf62 on Dec 5, 2022

Works Great!

Less expensive than most flea and tick prevention and works just as well. Glad I ordered it from Chewy!

Rated 1 out of 5 stars
By SumO on Sep 17, 2022

Does not work

Had her on it for a couple of months to check to see if it would slowly build up but NO. The bugs in the south are numerous and very voracious. This might work in other locations but not in the Southern US.

Rated 1 out of 5 stars
By KROB on Sep 13, 2022

DId not work

I live in the south where flea season is pretty much all year round and this did not work for my 40 pound, short haired mut. I have pulled multiple fleas off of her since using this. Would not recommend.

Rated 3 out of 5 stars
By Boomer on Jul 20, 2022

Mid product-Not sure it worked

I purchased this brand over the more expensive because it appeared to have a higher amount of medication than the other. I'm not 100% sure it is working. My dog continues to scratch and chew but this may be allergies. I haven't seen any fleas recently so we will continue to monitor the next few doses and see if it improves.

Rated 2 out of 5 stars
By Connie on Nov 7, 2022

Not great product

This product was ok at first but as summer got hotter it didn't work. Very disappointed.