Sentinel Spectrum Chew for Dogs, 8.1-25 lbs, (Green Box)

By Sentinel Spectrum
Rated 4.5905 out of 5 stars
Prescription Item
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Sentinel Spectrum Chew for Dogs, 8.1-25 lbs, (Green Box), 6 Chews (6-mos. supply) slide 1 of 6
Slide 1 of 6
Sentinel Spectrum Chew for Dogs, 8.1-25 lbs, (Green Box), 6 Chews (6-mos. supply) slide 1 of 6

$52.99Chewy Price
This item requires prescription approval.

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Bundle Heartgard Plus with NexGard and Save 15% Off at Checkout With Code: HGNG15

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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.

Play Video: Learn More About Sentinel Spectrum From Our Team of Experts
Learn More About Sentinel Spectrum From Our Team of Experts

Dosage Chart

Color on BoxWeight RangeStrengthDosageProduct Page
Orange2-8 lbs2.3 mg Milbemycin Oxime, 46 mg Lufenuron & 22.8 mg PraziquantelAdminister orally once a month✓-Click Here
Green8.1-25 lbs5.75 mg Milbemycin Oxime, 115 mg Lufenuron & 57 mg PraziquantelAdminister orally once a month✓-Click Here
Yellow25.1-50 lbs11.5 mg Milbemycin Oxime, 230 mg Lufenuron & 114 mg PraziquantelAdminister orally once a month✓-Click Here
Blue50.1-100 lbs23 mg Milbemycin Oxime, 460 mg Lufenuron & 228 mg PraziquantelAdminister orally once a month✓-Click Here

ReviewsWrite a Review

Rated 4.5905 out of 5 stars
105 Reviews
Would recommend to a friend

105 Customer Reviews

Rated 5 out of 5 stars
By Vernie on Apr 22, 2022

Chewable Sentinel

Great product for Angel. She took it with no problem. Previously, she had hard one's and she didn't want to take, unless I put it in peanut butter.

Rated 5 out of 5 stars
By Protecter on Mar 19, 2022

Works great

I have used Trifexis for years and had to put it down my cocos throat and it was always stressful, knock on wood she ate it on her own and was nice, no problems so far.

Rated 5 out of 5 stars
By DoggieMommy on Apr 3, 2022

Great product and service!

I found this product to be great for my dog and Chewy's purchasing experience to be very easy and reliable. Thank you.

Rated 4 out of 5 stars
By Lauren on Nov 16, 2021

Wish my dog would eat them plain

I use Sentinel because my Aussie has drug sensitivity (common for the breed), so she cannot take ivermectin. In terms of parasite protection, I trust Sentinel for coverage. These don't bother her sensitive stomach at all; she'll have normal poos after giving her the chew. I just wish these tasted better for my dog. She'll eat nearly anything, but turns her nose to these. I've resorted to crushing them and mixing with wet food or peanut butter, but she'll still try to pick it out.

Rated 5 out of 5 stars
By Lara on Aug 17, 2021

No need to hide the chew!

I’m so glad we made the switch to an all in one monthly preventative. It’s always been a task trying to get our girl to eat 2 different chews. Sometimes times lunch meat works, sometimes peanut butter, but sometimes not. With this preventative she ran over as soon as I punctured the blister package. Evidently they are delicious. No need to disguise it with anything. I’ve never seen her willingly just eat the chew like that. I wish we would have switched sooner!

Rated 5 out of 5 stars
By HappyCustomer on Jul 27, 2021

Sentinel Spectrum Rx

Chewy's customer service reps and communication are incredible. INCREDIBLE. They have been very helpful on numerous occasions, such as when contacting my vet for RXs, updating me on progress regarding a delay in my order, etc. They even send my toy poodle birthday cards each year. So sweet! I really appreciate Chewy. (Oh yeah, I almost forgot to review the product....Sentinel Spectrum is awesome in protecting my poodle from a vast array of pesky problems. I give it to her every month without fail, even though she spends 99% of her life inside. If you have ever seen a mosquito or tick inside your house/apartment, then you STILL MUST PROTECT your matter how little time it spends outside. BTW: My toy poodle weighs 6.8 pounds and I give her monthly dose to her on the last weekend (Friday) of each month, because it tends to upset her tummy, which requires more potty breaks. Giving it to her on the weekend allows for me to be home with her more, thus making the added potty breaks more convenient than if I were at work during the week. I am not saying that this RX will do that to YOUR pet, but my little girl has a sensitive stomach, so this is just what I've learned works best for us.) I HIGHLY recommend Chewy AND this RX.

Rated 5 out of 5 stars
By Lynn on Oct 8, 2021

Dog, cat and birds

No matter what I order it is always great. Customer service is always pleasant. Products are exactly what you see online. I hardly ever buy from stores any more when it comes to my fur babies.

Rated 5 out of 5 stars
By firet25 on Sep 25, 2021

Definetely worth it

We love how chewy had this for an affordable price compared to our vet! Have purchased twice so far and will continue to buy from them. Our dog eats this without any problems or side effects thankfully.

Rated 2 out of 5 stars
By Krista on Jul 9, 2021

Still had to buy a 2nd flea treatment

I ordered a 6 months or a year of this product? I live in southern TN. This seemed to work on the fleas for a couple of months. But in June my 9lb long hair dog had fleas, like something terrible! We already had our yard sprayed in May (we spray twice a year). Our indoor cat did not have any fleas. We had to take her to the vet for a different medication to get rid of the fleas, plus have the inside of our house sprayed (extra than normal monthly treatment). We also took her to the groomer for a flea dip. I'm assuming the heart worm is working? I gave it 2 stars because it seemed to work before the heat of the summer.

Rated 5 out of 5 stars
By Doggies on Oct 7, 2021

Shipping with ontrac is not good.

My order is delayed. Chewy notified me of the delay, which is very very nice. However they chose to use ontrac to send it and ontrac isn’t getting it here.