SENTINEL SPECTRUM Chew for Dogs, 50.1-100 lbs, (Blue Box), 6 Chews (6-mos. supply) -

Sentinel Spectrum Chew for Dogs, 50.1-100 lbs, (Blue Box)

By Sentinel Spectrum
Rated 4.2444 out of 5 stars
Prescription Item
Pet Weight
Pet Weight

$77.99Chewy Price
This item requires prescription approval.

Medications ship separately. Delivery times may vary.

In Stock
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We'll collect your pet's prescription information at Checkout.

About This Item


Your furry friend must have a current heartworm test result on file with your veterinarian in order to be prescribed heartworm medication. Please visit your veterinarian to have this test performed annually to protect your four-legged friend. Sentinel Spectrum is a monthly oral preventive prescription that guards against heartworms, adult roundworms, adult hookworms, whipworms, and prevents the development of flea eggs. It protects your dog against heartworm disease and intestinal worms, all in a palatable, beef-flavored chewable.

Proudly sourced directly from the manufacturer or their approved distributor. Guaranteed genuine and backed by the manufacturer.

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Learn More About Sentinel Spectrum From Our Team of Experts

ReviewsWrite a Review

Rated 4.2444 out of 5 stars
135 Ratings
Would recommend to a friend

135 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 Revi on Apr 28, 2023

Sentinel Spectrum - Heartworm Free!

I have been using Sentinel Spectrum chews for over a year now per the recommendation of my veterinarian. I got a prescription through Chewy after my dogs hit 50+ pounds. It's wonderful not having to drive back and forth to the vet all the time just to get heartworm medication. The process of delivery was quick and easy. My Malinois just got her heartworm test yesterday and it came back negative. Her fecal tests have been coming back negative too for parasites. My only complaint is I wish the chews were softer or more appealing to dogs. My girls will usually eat anything but spit these out. We mix it in different foods and they gobble it right down. We will continue to use this product for years to come. :)

Rated 1 out of 5 stars
By JD on May 27, 2023

Does not prevent hookworms.

This medicine is suppose to prevent hookworms. I put my dog on this medication March 31st, 2023 and gave her another chew 5/1/2023. My dog was diagnosed with hookworms 5/27/2023. My dog also does not like these chews. I must cut into pieces and feed with peanutbutter to get her to eat them.

Rated 5 out of 5 stars
By Karen on Jun 4, 2023

One chew does it all

I've been using this for years on all our dogs and the Battle Buddies foster dogs. Much better to give one chew that they like than to have to give two things and the liquid flea meds burned some of our dogs.

Rated 5 out of 5 stars
By Mimi on May 19, 2023

Fast and better priced dog meds.

This was less expensive than getting it at the Vets and it came promptly. They got the prescription from the Vets office for this monthly flea medication

Rated 5 out of 5 stars
By Esther on Dec 31, 2022

Great for Rescues / Any Dog with Recurring Worms

My dog was rescued and had every worm in the book when I got him. He had a really hard time getting rid of the tapeworms, and this was suggested by my vet. This chew gets gobbled up like a treat, and I like that it helps with routine deworming, in addition to the great prevention. My dog has had no side effects or issues with this medicine.

Rated 5 out of 5 stars
By Michele on May 21, 2023

Girl Natty

All was good for this big girl. So it looks like continuing monthly

Rated 5 out of 5 stars
By Bobb on Mar 25, 2023

Great service

Easy to get my product from my past place that I was getting it from which requires a doctors aprovel.

Rated 5 out of 5 stars
By Nancy on Mar 30, 2023

Heartworm med

This medicine is great since it combines heart meds with flea and tick prevention.

Rated 5 out of 5 stars
By NJPAM on Oct 18, 2022

Easy Peasy Dosing Trick

These Sentinel Spectrum Chews are very easy to give and I like the peace of mind knowing our GSD princess Elsa is not going to get heartworm and such. Elsa has been on these from the start. Stickers come in the box to put on your calender so you get reminded when they are due. Elsa would not eat these little brown bricks, as they are hard not soft which is what we expected since the product is called a "chew". When we first tried she would show initial interest, then just spit them out. So we put them in a sealed, air squished out Ziploc bag (Ziploc bag = they stay put, no mess or bits flying) making them easy to crush with the butt end of a wooden rolling pin (any implement with a wider solid end, or a mortar and pestle would work too). Then, we mixed the crumbles with her food. Elsa has half a can of wet food mixed with her kibble (plus a 1/4 cup of water, she likes really wet food!), it is what she likes, which means the crushed pill is really hidden. If you only use kibble, the pill would still probably be sufficiently disguised, or you might consider getting a can of wet dog food, at least for the once a month dosing, to get ALL the med in the dog! I also like that we can safely give the frontline plus flea and tick shoulder spot drops in conjunction, without risking a problem, although we do tend to give two weeks apart, just because that is what we chose to do. Recommended.

Rated 4 out of 5 stars
By sheilasmom on Nov 10, 2022

so far my dogs think these are okay

Preventative treatment is a must here in Texas. The mosquitos carry heartworms. Without prevention, you pet will most likely get them. Heartworms kill if left untreated. So far I am happy with the Sentinel Spectrum chews. 4 of the 6 dogs will take them as a treat. The other 2 have to be tricked into taking them.