Tri-Heart Plus Chewable Tablet for Dogs, up to 25 lbs, (Blue Box), 12 Chewable Tablets (12-mos. supply)

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$57.98 Autoship Price
  • Never miss a dose with easy refills
  • Skip, change, or cancel anytime
$57.98 Chewy Price
($4.83 /ea)

In Stock
FREE delivery
Usually arrives in 3-5 days
Prescription approval made easy
We’ll reach out to your vet clinic.

No interest if paid in full in 6 months on PayPal purchases of $149+. .

Medications ship separately. Delivery times may vary.

About This Item

Details

  • Prevents heartworm disease, treats, and controls roundworms and hookworms
  • Kills heartworm larvae before they reach your dog�s heart
  • Enjoy year-round protection for your dog, with monthly treatments
  • Easy-to-give, beef-flavored, chewable tablet that your dog will enjoy.
  • Safe for dogs with beef allergies

Ingredients

Instructions

FAQ

Learn More About Tri-Heart Plus From Our Team of Experts
4.8
Rated 4.8 out of 5 stars
3279 Ratings

Customers Mention

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

Ease of Use

92% Positive

Effectiveness

92% Positive

Ingredients

90% Positive

Long-Term Benefits

91% Positive

1071 Customer Reviews



Always consult a veterinarian about your pet’s health needs. Customer reviews should not be used as medical advice.

Rated 1 out of 5 stars
By Randolph on Jan 24, 2026

Lousy delivery

The shipment was left at one of our association gates about 3/4 mile from our house and was left in the middle of the road. If Chewy is going to use On Trac for

The shipment was left at one of our association gates about 3/4 mile from our house and was left in the middle of the road. If Chewy is going to use On Trac for deliveries in the future, let me know and I’ll purchase my dog meds elsewhere.


Rated 5 out of 5 stars
By Brenda on Feb 3, 2026

Have used this for all my dogs and very happy with it.

It does the job of keeping them from getting heart worm disease. Every test for heart worm has been negative so I’ll keep using this on my dogs.

It does the job of keeping them from getting heart worm disease. Every test for heart worm has been negative so I’ll keep using this on my dogs.


Rated 5 out of 5 stars
By MaryLou on Jan 6, 2026

Price

Glad to have the product and it was less expensive than other options. Unfortunately, it was the exact same price as the vets, so most likely I will purchase from

Glad to have the product and it was less expensive than other options. Unfortunately, it was the exact same price as the vets, so most likely I will purchase from the vet in the future.


Rated 5 out of 5 stars
By shannon on Jan 24, 2026

Easily accessible

Chewy counts the vet for you to get approval and then just ships it right to you and quickly. Everything just goes so smoothly with no problems.

Chewy counts the vet for you to get approval and then just ships it right to you and quickly. Everything just goes so smoothly with no problems.


Rated 2 out of 5 stars
By cora on Jan 5, 2026

Could not take

Tri-Heart Plus gave my puppy diarrhea and on the last dose he threw it up. I discontinued. His vet put him on another brand, he had no side effects with it.

Tri-Heart Plus gave my puppy diarrhea and on the last dose he threw it up. I discontinued. His vet put him on another brand, he had no side effects with it.


Rated 5 out of 5 stars
By chasity on Feb 6, 2026

Service

Chewy is the best! Orders are delivered prompt and customer service is the best! Pricing is always great as well

Chewy is the best! Orders are delivered prompt and customer service is the best! Pricing is always great as well


Rated 1 out of 5 stars
By Victoria on Dec 3, 2025

SOOOOOOOOOOOO Late

This was ordered but because it came with something else Ginger didn't get her dog food in 2-3 days as you promise. She had to wait and I had buy other dog food

This was ordered but because it came with something else Ginger didn't get her dog food in 2-3 days as you promise. She had to wait and I had buy other dog food which made both of US VERY UNHAPPY WITH CHEWY


Rated 5 out of 5 stars
By Catherine on Feb 5, 2026

Great medication to protect Prancer from Heart issues

I have been giving Prancer this Heartworm preventative for many years. It is reliable and chewable.

I have been giving Prancer this Heartworm preventative for many years. It is reliable and chewable.


Rated 5 out of 5 stars
By Sharon on Jan 12, 2026

Great vaule

I was able to get a 6 month supply of both my dogs meds for less than one month from my vet! I absolutely love this site

I was able to get a 6 month supply of both my dogs meds for less than one month from my vet! I absolutely love this site


Rated 4 out of 5 stars
By Muriel on Jan 31, 2026

the refill came in a timely manner which is appreciated.

Morkey can't wait to get his monthly dose....He thinks its a treat so I let him think that it is!

Morkey can't wait to get his monthly dose....He thinks its a treat so I let him think that it is!