SENTRY Flea & Tick Collar for Dogs, 1 Collar (6-mos. supply) -

Sentry Flea & Tick Collar for Dogs, 1 Collar (6-mos. supply)

By Sentry
Rated 2.875 out of 5 stars
$6.89Chewy Price
$11.99Chewy Price
$6.55Autoship Price
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About This Item


  • Long-lasting collar that works for 6 months when worn continuously.
  • Kills adult fleas before they can lay eggs to prevent re-infestation.
  • Designed to fit necks up to 24.5 inches for dogs 12 weeks of age or older.
  • Features waterproof ingredients that will not rub off or rinse away during baths.
  • Made in the USA!

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Rated 2.875 out of 5 stars
24 Reviews
Would recommend to a friend

24 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 LizardBreath1 on Dec 14, 2022

Not effective

I got this in the hopes that it would work for my mother's dog who currently has fleas. We were very short on funds, so I went with a cheaper option in the hopes that the sooner I acted, the better. That probably would've been the case if this product worked. Granted, I don't have a ton a experience with flea/tick treatments, but this was such a wild disappointment. It can take up to 3 weeks to work, so this might be a good option if you don't need effective treatment immediately. After about a week, I noticed that my mother's dog started trembling pretty consistently without an obvious reason. Then when I went to check the skin around where the collar sat, I saw that he had a very red mark that circles the front of his throat. His itching has also not improved, even a little bit. I'm going to just go to Frontline. It works super well for our cats and I'm hoping it'll be better for him than this. I do NOT recommend this collar.

Rated 1 out of 5 stars
By Rupert on Dec 15, 2022

It made me itchy

Dad got this for me and Tanner and Becky. We're Dachshunds. Me and Tanner have short hairs but Becky has long hairs. Mom and Dad put this on me after all of us had a bath. By the end of the day, me and Tanner were all itchy around our necks and Tanner even had to wear the cone of shame. Becky was itchy but she has more hair than me Our necks got all red and sore from scratching and Mom took them off. Dad sprayed some medicine on everyone's neck and after about two days our necks were ok. We thanked Mom and Dad for making our necks better but asked to please not use these flea collars any more.

Rated 1 out of 5 stars
By mary on Feb 25, 2023

Can I return it

My dog has been rubbing his eyes and tearing after wearing your product for only a couple of hours. I hope I will not have to take him to the vet.

Rated 5 out of 5 stars
By Kody on Oct 3, 2022

Great Flea & Tick Collar

We have a miniature schnauzer that is hypo-allergenic. The is one size collar, fit to neck and cut the end off, it works great, we live near the woods. Cheaper than a overpriced shot at the vet.

Rated 1 out of 5 stars
By judy on Dec 8, 2022

Pet mother

Waste of money I bought 6 an not one did any good. Will not waste my money on this again

Rated 5 out of 5 stars
By Unique on Sep 22, 2022

It helps and worth a try

I tried this just as added protection for my dog along with a flea treatment.

Rated 1 out of 5 stars
By Dogmom on Apr 12, 2022

Do not risk using

Not even 12 hours after putting this on my dogs it burned my dogs skin and inflamed the area where the collar rested on her neck. Had to to take her to emergency where the injected her with antibiotic and steroid then gave me a topical cream for burn. Oh and as the day went on all my dogs started scratching worse. So I had to remove them all. This collar poisoned my dog. Thank goodness she is okay now.

Rated 3 out of 5 stars
By Kate on May 18, 2022

Sentry collar

This collar turned my dogs neck yellow... She hasn't had it long enough to know if it actually works but do not like what it does to her coat.

Rated 5 out of 5 stars
By bordercolliesatthebordee on Jul 21, 2022

Tastes great!

Great alternative dry food with a good variety of ingredients.

Rated 5 out of 5 stars
By Collar on Apr 24, 2022

Flea collar

Have a lab that suffers from sensitive skin This product has helped