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At a Glance
Prevents heartworm & kills flea eggs in dogs
Delicious beef flavor
Kills flea eggs and prevents infestation
No messy pipette application
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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Pet Size
Don't know your pet's weight?
If you can't get them on the scale, try this super simple method:

1) Weigh yourself.
2) Weigh yourself holding your pet.
3)Subtract the two numbers to get their weight.

Too heavy to hold? Your vet will weigh them if you ask (or may already have it on file if you call).
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How To Order Prescriptions Online

  • 1

    Find the right product

    Make sure it matches your pets prescription. Don't forget to compare the dosage for pills/capsules!

  • 2

    Add to Cart

    Just like any other online store. Make sure the quantity matches what's been prescribed by your veterinarian.

  • 3

    Tell us about your pet and vet

    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

    That's It!

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

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    • Available in 6 or 12 month packs, for dogs in weight ranges 5-22 lbs, 23-44 lbs, 45-88 lbs, and 89-132 lbs
    VIEW DETAILS
    K9 Advantix II for Dogs
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    • Kills fleas and ticks within 12 hours
    • Kills flea eggs, pupae, larvae, and adults for 30 days
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    Seresto 8mo. Dog Flea & Tick Collar
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    VIEW DETAILS

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Rated 4.5 out of 5 by 179 reviewers.
Rated 5 out of 5by Sentinel works great!!I take my dog to the dog beach and dog parks so he is exposed to many parasites but he remains parasite free. Sentinel works great! 08/11/2018
Rated 5 out of 5by great productmy dog takes this without difficulty. easy to give and very effective! 08/08/2018
Rated 5 out of 5by SentinalYou have to presume it will work. 07/17/2018
Rated 5 out of 5by Sentinel Works for FleasI have been using Sentinel for years for my pugs and have not had any problems with fleas. Two years ago I switched to Seresto flea collar that was suppose to work for 8 months and within 5 months all my dogs had fleas. I have switched back to Sentinel and also use Frontline Plus during the summer months. 06/08/2018
Rated 5 out of 5by So Easy and ConvenientPurchased my heartworm meds for my 5 Chihuahuas from PetCare RX. The service is perfect for me. Easy order, they contact my vet for approval, great communications regarding status of my orders. Love that I can pay with Paypal! Will continue to use this petmed pharmacy! Thank you PetCareRX!! 05/26/2018
Rated 5 out of 5by does its jobso far works well for my dog, no fleas or ticks despite walking and running in wooded areas. 05/14/2018
Rated 5 out of 5by AwesomeNothing bad to say about this product. Ive been using it since my boys were puppies. 05/10/2018
Rated 5 out of 5by SentinelI have been using Sentinel for two years , Its effective and Max doesn't mind it. I break it in half and he chews the tablet. I used to have a terrible time with Trifexis for my previous pup, a German Shepherd . Horrible taste and smell. 05/08/2018
Rated 5 out of 5by great protectionSentinal is great for flea and heart worm protection. My dog has been on this for over a year now, and just had vet visit and negative for heart worm. this medicine has proven it works, no fleas ever. 04/20/2018
Rated 4 out of 5by New ProductI like 2 in 1..Heartworm and Fleas 03/28/2018
Rated 5 out of 5by Sentinel for DogsWe have used this for years for our dog. She likes the chewable tablet and it has been very effective. 03/25/2018
Rated 5 out of 5by Always Senintel......for all our dogs going back decades! 02/22/2018
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