Sentry FiproGuard Flea & Tick Spot Treatment for Dogs, 45-88 lbs

By Sentry
Rated 3.7425 out of 5 stars

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$49.99Chewy Price
$47.49Autoship Price
(Save an extra 5%)

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About This Item


  • The active ingredient is Fipronil, a powerful chemical used in leading tick medications.
  • Treatment kills adult fleas and ticks and protects against chewing lice.
  • Use on your favorite puppy eight weeks and older.
  • Stop the flea life cycle and kill flea eggs and flea larvae for up to 12 weeks.
  • Apply this treatment for relief that is fast acting, long-lasting, and waterproof.

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

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Top IngredientsActive Ingredients : Fipronil 9.70%.Active Ingredients: Fipronil 9.70%.Active Ingredients : Fipronil 9.8% , (S)-methoprene 8.8%.Active Ingredients: Fipronil 9.80%, (S)-methoprene 8.80%.Active Ingredients: Fipronil 9.8%, (S)-Methoprene 8.8%.
LifestageAdultAdultPuppy, Adult, SeniorPuppy, Adult, SeniorAdult
Breed SizeMedium Breeds, Large BreedsSmall Breeds, Medium BreedsMedium Breeds, Large BreedsMedium Breeds, Large BreedsMedium Breeds, Large Breeds

Questions & Answers

13 Customer Questions

Will this still work if you bathe the dog after? Or go swimming?
Answer by ChewyJun 19, 2017
After allowing the treatment to be absorbed for 24 hours, you will be able to bathe your dog, or allow them to go swimming.

How does it work is it absorbed into the skin
Answer by ChewyMay 01, 2019
This product is dispersed over the pet's body by the natural oils on their skin and attaches to the hair follicle. This process can take up to 24 hours.

I have a dog that's 32 lbs. And one who's 61 lbs. Would it be okay to apply this to the 31 lb dog instead of having to buy two separate applications?
Answer by ChewySep 17, 2018
This treatment is formulated for specific weight ranges. It is important to use this treatment as directed, for the weight listed. Otherwise, it is possible to overdose or under-dose your pet.

Does it also kill flea eggs and larvae that may be on the skin?
Answer by ChewyJun 26, 2023
This treatment will stop the flea life cycle and kill flea eggs and flea larvae for up to 12 weeks. It also kills adult fleas and ticks and protects against chewing lice.

ReviewsWrite a Review

Rated 3.7425 out of 5 stars
233 Ratings
Would recommend to a friend

232 Customer Reviews

Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.
Rated 4 out of 5 stars
By Timothy on Nov 1, 2023

Does the job

I am on a fixed income so I do have to watch my spending and this product was reasonably priced. But I stayed with it because we live in the mountains on a river and this product has kept my dog completely pest free

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

Would not recommend

I am extremely disappointed in this product. I was hoping the few good reviews I read would hold out. They didn't for us, unfortunately. It's been about 3 weeks, and my pups are suffering. This flea medication did not work at all.

Rated 2 out of 5 stars
By 20elidor on Aug 1, 2023


Before buying this product I looked at the reviews. I like it had a high star rating. I put it on my black lab this morning. Not liking the white coating it’s leaving on his fur. I have never had this happen with other products. Hopefully it works and this white stuff will go away.

Rated 1 out of 5 stars
By red on Aug 27, 2023


After using this product, I ended up treating my dogs again two weeks later and spending hundreds of dollars to get the fleas out of my house?

Rated 5 out of 5 stars
By Seany on Jun 3, 2023

Great Product!

I bought this for my dog and my sister’s dog. They both love running into marshlands behind my home and they both come home with ticks! Personally I blame Bella (sisters dog) because she is an instigator :) So far after applying this product, no ticks!

Rated 5 out of 5 stars
By TL on Sep 12, 2023

Great price and product

We got this for our dogs and it works great! We haven't had any issues with fleas

Rated 5 out of 5 stars
By Ammie on Apr 22, 2023

This stuff works

I live on a farm in Central Florida. I use this on my 2 dogs and cat(type for cats) It keeps my pets flea free at a cost effective price. My sister uses expensive pills from vet for her 3 dogs and they still get fleas. I will continue to use this as long as it keeps working. Every month I give my dogs a bath with a natural flea shampoo then 48 hrs later apply flea treatment. As long as I keep to this schedule I don't have a flea problem.

Rated 5 out of 5 stars
By Chase on Jun 3, 2023

Works for my GSDs

Each environment is different, so what works for one may not for another. Keeps them mostly flea and tick free. They are outside only dogs with lots of woods and wildlife here in Middle TN. Cheaper than many name brands.

Rated 4 out of 5 stars
By Zoey1Ziva2 on May 4, 2023

flea n tick

I’ve been using sentry plus for years it works as long as you put it on when you’re supposed to. I’ve found if you’re late you’re fur babies will find a tick. My dogs and cats have never had fleas and they all spend a lot of time outside. We go wilderness camping, hunting and they love the water. Works great!

Rated 1 out of 5 stars
By never on Apr 21, 2023

No relief- 3 months in and they’re still scratchin

This didn’t work at all! I’m on the third month for my two shepherd mixes, and I have not seen any improvement. We live in Texas and fleas are relentless, and I almost feel like they have gotten worse since starting this 3 months ago! I just reapplied yesterday and both dogs are uncontrollably scratching. The fleas are even jumping on me now! :(