Onguard Flea & Tick Spot Treatment for Dogs, 45-88 lbs, 3 Doses (3-mos. supply) -

Onguard Plus Flea & Tick Spot Treatment for Dogs, 45-88 lbs

By Onguard Plus
Rated 3 out of 5 stars
Pet Weight

$21.75Chewy Price
$20.66Autoship 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 45 to 88 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

10 Customer Questions

who makes this product?
Answer by ChewyOct 07, 2020
Onguard Plus is exclusively made for and distributed by Chewy! We work closely with production partners to create and develop our own recipes and oversee production to ensure it adheres to our quality standards. Onguard Plus is manufactured in the United States.

Does this cover Lice as well?
Answer by ChewyMar 23, 2021
Onguard Plus Flea & Tick for Dogs kills all life stages of fleas and ticks on dogs at least 8 weeks old and ranging from 45 to 88 pounds. This topical also controls infestations of chewing lice and sarcoptic mange mites.

Does the flea have to bite the dog to kill the flea?
Answer by ChewyMay 23, 2021
This treatment kills fleas and ticks through contact with your pet's haircoat. They do not have to bite your dog for this to work.

Is this a preventative application or only if they already have fleas?
Answer by ChewyMay 14, 2021
This treatment will kill existing fleas and tick and remain effective for 30 days.

ReviewsWrite a Review

Rated 3 out of 5 stars
135 Reviews
Would recommend to a friend

135 Customer Reviews

Filter by reviews that mention

Rated 3 out of 5 stars
By Cathy on Dec 31, 2022

Not Totally Effective

We are having a terrible year for fleas. The Advantix II that I had been using on my four dogs for years quit working. I could not get a quick veterinary appointment for prescription oral drug treatments. So I decided to try something with a different formulation. The results have been mixed. Our really old dog still has quite a few, while our young golden retriever is itchy but we have only found just a few on her. My 9-year-old Jack Russell has remained flea free.

Rated 1 out of 5 stars
By Lindasdoggies10 on Oct 11, 2022

Not Worth It

I purchased this product and It did not work. I'm very disappointed!!! I'm on a fixed income and times are hard. I needed a tick and flea prevention for my animals and this product was highly recommended to me, but unfortunately it did not work. It ended up costing me more money and time. * I Do Not Recommend this Product * I purchased this product for two dogs and a cat. Sad to say they ended up contacting fleas. More money and time wasted. In my opinion this product needs to be taken off the website. It's very misleading and it doesn't do justice for our animals 😢 Thank you!

Rated 1 out of 5 stars
By dirtyears on Sep 18, 2022

Flea and tick

I made the mistake of trying this I have always used advantix in the past on my 3 rotties never had a problem if a tick happen to get on or not it would die and come right off. First week of trying this one of my dog's had a tick embedded in him. Had to twist the darn thing out with twizzers. Unfortunately 2 of them have had Lyme disease in the past so was hoping this did as well of a job with tick as it says it does. Well back to the expensive stuff but I have to wait a couple weeks since I've already put this on them..

Rated 2 out of 5 stars
By Hannah on Sep 20, 2022

Ehhh Not worth it

We are combating a flea infestation, bought this to go with oral meds. It simply didn’t help. Even starting out with no fleas on the dog, he was covered 2 days later. It is, however, the same medication and the more expensive topicals, but neither work. Moved to Nexguard. I give up on topicals.

Rated 1 out of 5 stars
By Khole on Nov 22, 2022

One star review

Doesnt work at all I put this product on my dogs over five days ago and hasnt help what so ever I wouldnt recommend to any one

Rated 5 out of 5 stars
By Jonl on Nov 26, 2022

Works Great.

I have no clue why the negative reviews. I have used Frontline and others. This works just the same.

Rated 1 out of 5 stars
By LLB1 on Jul 31, 2022

didn’t work

I have used this as a preventative measure monthly on my dog and cat(the cat one) for about 6 months now. They got fleas last month while on it, and it did nothing to help them. The numbers kept going up while within the month of giving it, getting baths, and daily brushing. I will never be purchasing this brand again. Lesson learned to just stay with frontline or better.

Rated 5 out of 5 stars
By Holmesie on Nov 16, 2022

Really works!

Onguard really does work! I've used cheaper brands but they did not work as well as Onguard.

Rated 2 out of 5 stars
By Dede88 on Sep 14, 2022

Greasy formula

I think it has been effective so far but leaves a really greasy gritty feeling on my dog's fur. I put it down on her skin as directed but still her fur looks and feels dirty.

Rated 5 out of 5 stars
By Tracy on Nov 2, 2022

works as well as expensive brand

I have used this on my lab for years, the ticks just fall off of her and no skin irritation, very happy