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At a Glance
Prevents heartworm & kills flea eggs in dogs
Delicious beef flavor
Kills flea eggs and prevents infestation
This product requires a prescription.

Sentinel for Dogs

A tasty, chewable tablet, Sentinel for Dogs make it easy to keep your dog protected against fleas and other parasites, including heartworm, for a month. [+]

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2

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Answer some questions during checkout and we'll contact your vet and verify the prescription for you. (you can also mail us the written prescription)

4

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If the prescription has any refills, processing your future orders for that medication can be expedited.

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Rated 4.5 out of 5 by 165 reviewers.
Rated 4 out of 5by Easy Treatment We've been using Sentinel for our dog, Boone, for the aspt four years and it works well. Boone eats it without a problem. All annual heartworm tests have been negative so the product works. 07/02/2016
Rated 5 out of 5by Awesome Customer Service Great for your Pet and I thank Petcarerx for the great customer service every time I do an order! 07/01/2016
Rated 5 out of 5by Very effective, no side effects. we've used this product for many years, very satified. GREAT price. 07/01/2016
Rated 4 out of 5by Fast shipping, good price for a heartworm preventative We have been using Sentinel for a few years now and PetRx saved us quite a bit this year. This keeps our dogs healthy and heartworm free and is incredibly convenient to order online with renewal with the PetPlus program. My dogs eat this like a treat - no bread or peanut butter or anything like that needed. They have been flea-free their whole lives so I don't know if that is our yard being well kept or if it is due to the Sentinel. Same for heartworm - this monthly treatment appears to have kept them healthy. They have no side effects whatsoever when taking this product. This product - even though some think it takes care of Ticks, it does not. If you want tick prevention, you have to get another product. Our veterinarian also explained that it does not kill adult fleas, it only kills flea eggs and prevents them growing on the dog in the fur, so if you have outdoor pets or they run in unmowed fields, etc, you might want something that keeps the adult fleas off of them as well. But for us, this is all we need. PetRx delivered this to us fast and with no hassles. Thanks! 06/23/2016
Rated 5 out of 5by Using Sentinel for years with excellent results. We are very happy with this product. Been using Sentinel for many years for our dog. 06/10/2016
Rated 1 out of 5by Not effective for my pets I don't think this product had enough ingredients to keep fleas from attacking my two dogs. We fed them the products per the directions. We've since requested and are still waiting to receive a dose of Capstar to see if that can improve their condition. 05/26/2016
Rated 5 out of 5by Worry free for another year When we bought our home we discovered that a previous owner had lost a dog due to Heartworm. We sure do not want to repeat that loss...so have to be diligent about a preventative. Sentinel is perfect for that and PetCare had by far the best price! 05/26/2016
Rated 5 out of 5by Great productGreat product as it combines flea and heartworm into one pill. However, my dog does not like these and I have to give it to her with some peanut butter. This has not been an issue with other pills. 05/02/2016
Rated 5 out of 5by this product works really goodthe prices are excellent and the product works great! 03/28/2016
Rated 5 out of 5by outstandingI have been using this product for about 3 years. He is 9 years old and is running around like a puppy. Love this product! 02/05/2016
Rated 3 out of 5by Does not kill adult fleasI would not recommend this to anyone who thinks their dog might come into contact with fleas. This product does nothing to fend against adult fleas so you will have to invest in other products to treat them. It is cheaper for now a very apparent reason... 01/25/2016
Rated 5 out of 5by Great product have used it for yearsI got everything I was promised price delivery 100% what I wanted great company thank you so much 12/25/2015
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