Sentinel Spectrum Chew for Dogs, 2-8 lbs, (Orange Box), 6 Chews (6-mos. supply)

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$54.99 Autoship Price
  • Never miss a dose with easy refills
  • Skip, change, or cancel anytime
$54.99 Chewy Price
($9.17 /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
281 Ratings

Customers Mention

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

Ease of Use

91% Positive

Effectiveness

91% Positive

Ingredients

95% Positive

Long-Term Benefits

90% Positive

98 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 Kimberly on Mar 18, 2026

Prevention

Online ordering was easy and purchase received quickly. Due to this being a soft and chewy tablet, my senior fur baby is able to easily ingest.

Online ordering was easy and purchase received quickly. Due to this being a soft and chewy tablet, my senior fur baby is able to easily ingest.


Rated 4 out of 5 stars
By Terri on Dec 23, 2025

Great 4 Weight-loss

The price is reasonable. Was very easy process from getting the prescription sent to Chewy.com from my vet to getting it sent out from Chewy.com. My dogs all kinda

The price is reasonable. Was very easy process from getting the prescription sent to Chewy.com from my vet to getting it sent out from Chewy.com. My dogs all kinda share it. Their poops aren't runny or messy, they dont smell as bad either. We will keep on buying this as it helps keep the weight lowered in my senior, less active furbabies.


Rated 5 out of 5 stars
By Sonia on Oct 9, 2025

For years I’ve trusted Sentinel to be safe for my babies

Well, it’s safe and works well for US. I know many pet owners don’t want to give lots of chemicals to their pets. This is the only medication I trust it would help

Well, it’s safe and works well for US. I know many pet owners don’t want to give lots of chemicals to their pets. This is the only medication I trust it would help to avoid heart worm, and aids in repelling fleas & ticks. My doggies love ti go exploring around in my backyard; Sentinel works like my guardian angel. Brings piece of mind since they love to run around in the backyard where lots of deer and other critters often are wandering, close to the house .


Rated 5 out of 5 stars
By Mary on Dec 20, 2025

Very effective

I’ve been using this for years on multiple dogs. It is very effective and keeping the fleas away and they have always tested heartworm negative. Thedogs seem to

I’ve been using this for years on multiple dogs. It is very effective and keeping the fleas away and they have always tested heartworm negative. Thedogs seem to take the tablet very easily.


Rated 5 out of 5 stars
By Molly on Sep 28, 2025

Hard to find flea control

My old vet and my new vet no longer carry this product. Both vets tried to steer me to a more expensive flea control. My dogs are sensitive to medications, and since

My old vet and my new vet no longer carry this product. Both vets tried to steer me to a more expensive flea control. My dogs are sensitive to medications, and since this product works, I see no reason to change, especially if it is going to cost me more and possibly cause my dogs to have reactions from a different medication. So glad you carry Sentinel Spectrum!!


Rated 5 out of 5 stars
By Irene on Jan 20, 2026

The product and the service is very good

It works it does the job for my girls and the service of chewy is amazing

It works it does the job for my girls and the service of chewy is amazing


Rated 5 out of 5 stars
By kathy on Apr 1, 2026

Seems to be doing the job

No complain it could always be cheaper

No complain it could always be cheaper


Rated 5 out of 5 stars
By Tom on Mar 26, 2026

Pet Meds

On-time, timely, and friendly service!

On-time, timely, and friendly service!


Rated 5 out of 5 stars
By Donald on Mar 11, 2026

The combination of two drugs in one chew made it perfect

Our baby girl loved the chew

Our baby girl loved the chew


Rated 5 out of 5 stars
By Shannon on Dec 23, 2025

Great Product

I love this product and the price is amazing!

I love this product and the price is amazing!