Sentinel Spectrum Chew for Dogs, 8.1-25 lbs, (Green Box), 6 Chews (6-mos. supply)

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$56.99 Autoship Price
  • Never miss a dose with easy refills
  • Skip, change, or cancel anytime
$56.99 Chewy Price
($9.50 /ea)

In Stock
FREE delivery
Usually arrives in 3-5 days
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Medications ship separately. Delivery times may vary.

About This Item

Details

  • Protects against 6 different types of parasites, including tapeworms.
  • Unique to SENTINEL brand products, lufenuron stops flea eggs from hatching.1
  • Protects against heartworms, tapeworms, hookworms, roundworms, and whipworms.1
  • SENTINEL SPECTRUM does all this with convenient and effective once-a-month dosing and a soft beef and bacon-flavor dogs love.2,3
  • 1SENTINEL SPECTRUM Chews [prescribing information]. Madison, NJ: Merck Animal Health; 2020. 2Data on file. Merck Animal Health. 3SENTINEL SPECTRUM CHEWS [Freedom of Information] NADA #141-333.

Ingredients

Instructions

FAQ

Learn More About Sentinel Spectrum From Our Team of Experts
4.8
Rated 4.8 out of 5 stars
1520 Ratings

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Ease of Use

94% Positive

Effectiveness

94% Positive

Ingredients

92% Positive

Long-Term Benefits

94% Positive

484 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 Angela on Apr 2, 2026

Works well, however..

This product has never failed us as far as prevention goes, but I did knock a star off because none of our dogs have ever willingly eaten it. They hate the flavor

This product has never failed us as far as prevention goes, but I did knock a star off because none of our dogs have ever willingly eaten it. They hate the flavor enough to pick it out of peanut butter, soft bread, cheese, pill pockets, etc. (and these are dogs who normally gobble up anything). We have to break it into smaller pieces and “pill” them by forcing them to swallow. Not a fun time, but the protection it offers is important in our geographical area.


Rated 5 out of 5 stars
By Franklin on Mar 19, 2026

Sentinel spectrum is what the vets recommend

I ordered heartworm meds from chewy but I ordered the wrong item. Customer service help me fix my order in a heartbeat. Customer service is outstanding and kind

I ordered heartworm meds from chewy but I ordered the wrong item. Customer service help me fix my order in a heartbeat. Customer service is outstanding and kind and patient while fixing my order. couldn’t ask for anything better.


Rated 5 out of 5 stars
By Jeannine on Mar 18, 2026

Prevent fleas and ticks.

He's just the medicine for both of my pets I live out in the woods. However I do not have any fleas or ticks that are on my pets that seems to be working very well

He's just the medicine for both of my pets I live out in the woods. However I do not have any fleas or ticks that are on my pets that seems to be working very well. They have been on it for several years without any issues.


Rated 4 out of 5 stars
By Gayle on Apr 4, 2026

Not always good enough to be chewable

We have two dachshunds. One took this immediately but the other didn't agree that it's "chewable". I'll try again in a piece if steak

We have two dachshunds. One took this immediately but the other didn't agree that it's "chewable". I'll try again in a piece if steak


Rated 1 out of 5 stars
By Dr. on Mar 28, 2026

Shipped to wrong address

It was shipped to the Dr.’s address not the client. The Dr. was away for a month and had to call someone to retrieve it from the front steps

It was shipped to the Dr.’s address not the client. The Dr. was away for a month and had to call someone to retrieve it from the front steps


Rated 5 out of 5 stars
By Valerie on Feb 5, 2026

My Rescue was on this at the Rescue

We adopted my 4 year old Cavapoo from a rescue in December, 2025. The rescue used Sentinel Spectrum Chews so that’s what we continued her on. She loves the taste

We adopted my 4 year old Cavapoo from a rescue in December, 2025. The rescue used Sentinel Spectrum Chews so that’s what we continued her on. She loves the taste and I have no problem getting her to take it.


Rated 5 out of 5 stars
By Mary on Feb 26, 2026

Mommy Mary Dowless liked these for Precious and Rammy.

I have been using this on my 10 Pomeranians since it was developed through the years to my last two who are Precious and Rammy 13 years old 9-20-25.

I have been using this on my 10 Pomeranians since it was developed through the years to my last two who are Precious and Rammy 13 years old 9-20-25.


Rated 5 out of 5 stars
By Jean on Feb 10, 2026

Hilda’s Pills

I’ve had several orders from chewy most of them prescription for my dog. Everything is always delivered quickly and in perfect condition I’m very happy with and

I’ve had several orders from chewy most of them prescription for my dog. Everything is always delivered quickly and in perfect condition I’m very happy with and their service.


Rated 5 out of 5 stars
By Sandra on Mar 10, 2026

I use spectrum for my cavalier, King charles

My vet does not sell sentinel, but luckily, I could get a prescription and have Chewy send it to me. Chewy is the best!

My vet does not sell sentinel, but luckily, I could get a prescription and have Chewy send it to me. Chewy is the best!


Rated 5 out of 5 stars
By Tom on Mar 2, 2026

Great service

We order often be it, medicine, dog food treats etc Chewy is always reliable and dependable with quick delivery and responsive.

We order often be it, medicine, dog food treats etc Chewy is always reliable and dependable with quick delivery and responsive.