Vet-quality and FDA-approved ingredients in a convenient, easy-to-remember monthly dose.
*$20 per month for dogs over 100 lbs
Heart Defense prevents heartworms in dogs. The tasty, beef-flavored chewable tablets are FDA-approved, safe, and effective against canine heartworm, hookworms, and roundworms.
Heart Defense chewable tablets are meant to be consumed orally once every 30 days to prevent the development of heartworm larvae and disease.
Heart Defense prevents heartworm from developing — it does not treat existing heartworm infections. Infected dogs must be treated to remove adult heartworms and microfilariae before using heartworm prevention. Get your dog tested before starting treatment.
Heartworm disease poses serious and sometimes fatal health conditions for your pup. All it takes is one mosquito bite — and vet visits and medical bills can be expensive.
Keep your best friend’s heart healthy and tail wagging with effective and affordable prevention.
Heart Defense has the same quality ingredients and flavor as Heartgard® Plus — but in a convenient, easy-to-remember dose delivered to your door.
HEARTGARD is a registered trademark of Boehringer Ingelheim Animal Health USA Inc.
Your entire pack needs heartworm prevention. When you protect more pets, you save BIG.
|1 XL dog||@ $12||@ $20||$12||$20|
|2 XL dogs||@ $11||@ $19||$22||$38|
|3 XL dogs||@ $10||@ $18||$30||$54|
|4 XL dogs||@ $9||@ $17||$36||$68|
|@ $8||@ $16||$||$|
|Pricing for dogs over 100 lbs »|
Free shipping • Cancel anytime
Heartworm prevention in a single monthly dose, sized to your pet’s unique weight.
Create unique profiles for each pet. Be sure to include your pet’s name, weight, and a photo, so you always give the right dose.
When you add Heart Defense to your box, you’ll need a prescription. Use our simple search tool to identify your pet’s vet and request their Rx.
As soon as your prescription is approved, we’ll send your pet's personalized products straight to your door!
Give your pets their custom dose as soon as your box arrives. With our tasty chewable tablet, their monthly treatment feels like a treat.
Even with routine testing, it can take up to nine months to detect heartworm. Heart Defense prevents the development of heartworms before they become a problem.
Heart Defense is FDA-approved and made in the USA. This easy-to-remember chewable tablet makes prevention the heart of the matter.
Don’t get locked into multi-month packages — Heart Defense comes in a monthly dose with your pet’s name and photo on the front.
We don’t stop at heartworm protection. Give your pets the care they deserve — from topical flea & tick protection to dental care.
Heart Defense offers affordable and effective protection against heartworm disease in dogs without all the hassle. Every dose is tailored to your unique pet. Our product is comparable to Heartgard® Plus.
Heart Defense prevents heartworm in dogs and treats roundworms and hookworms. These parasites and intestinal worms can wreak havoc on your pets.
Yes! Heart Defense chewable tablets are vet-quality and FDA-approved. This means our heartworm preventative medicine is safe and effective when used as recommended on the label.
The active ingredients in Heart Defense are Ivermectin and Pyrantel Pamoate Salt. Given at the proper doses Ivermectin is safe for most dogs and is very effective in preventing heartworm disease.
Yes, all heartworm prevention requires a prescription from your veterinarian. Here are the steps to get a prescription:
Absolutely! Heart Defense is a tasty, beef-flavored chewable tablet.
Even young dogs are susceptible to getting bitten by mosquitoes and getting heartworm infections and disease. Heart Defense can be given to puppies who are at least 6 weeks of age.
Heart Defense is safe and effective and dosed according to your dog's body weight. We offer 3 weight breaks:
For dogs larger than 100 lbs we combine products to accommodate.
We offer the same affordable pricing as our flea and tick protection for dogs. Heart Defense starts at $12/month for small, medium, and large dogs. Dogs over 100lbs, will receive a combination of our existing weight breaks at $20/month.
|Small Dogs||Up to 25 lbs||1 Small Dog Box||$12|
|Medium Dogs||26 to 50 lbs||1 Medium Dog Box||$12|
|Large Dogs||51 to 100 lbs||1 Large Dog Box||$12|
|XL Dogs||101 to 125 lbs||1 Large Dog Box + 1 Small Dog Box||$20|
|XXL Dogs||126 to 150 lbs||1 Large Dog Box + 1 Medium Dog Box||$20|
|XXXL Dogs||151 to 200 lbs||2 Large Dog Boxes||$20|
Have multiple pets in your home? You’ll save $1 for every pet you add with our multi-pet pricing. And, shipping is free!
If your dog consumes more than one chewable in a month it can cause problems for your pet. Some symptoms to watch out for include:
If an accidental overdose occurs please contact our 24/7 medical line at 1-888-738-3911.
Unfortunately, yes. Here are some breeds that can be sensitive to Ivermectin:
If you're worried about your dog's sensitivity to Ivermectin, contact your vet for genetic testing.
No! This product is not approved for use in cats, rabbits, or other small animals.
No! Heart Defense will not kill adult heartworms. This product will only help prevent heartworms and heartworm disease.
Infected dogs must be treated to remove adult heartworms and microfilariae before using heartworm prevention. Make sure your dog is tested for an existing heartworm infection before starting treatment.
Most flea and tick protection, deworming medications, antibiotics, vaccines, and steroid preparations have been tested with our product to make sure it is safe. But, we recommend contacting your veterinarian for questions about specific medications.
When administered according to the instructions, Heart Defense is safe for most dogs. This includes pregnant females, breeding males and females, and puppies at least 6 weeks of age or older. Consult with your veterinarian before starting treatment.
Heartworm disease is a dangerous and fatal condition that starts with an infected mosquito bite. The mosquito passes heartworm larvae to your dog that mature and live inside your dog's lung and heart-associated blood vessels.
It takes about 6-7 months for the worms to mature. Adult worms can live in your dog's body for five to seven years. They cause damage to the blood vessels that can lead to severe lung disease, liver problems, and heart failure.
Heartworm disease can be hard to detect initially. In the early stages, there typically aren't any visible signs. However, if the disease progresses respiratory disease and heart-related issues can develop. This is also dependent on your dog's activity and overall health.
The most common symptoms include:
Heartworm protection starts with consistent heartworm medication. The American Heartworm Society suggests following the rule of 12 — 12 months of prevention and heartworm tests every 12 months.
Yes! It's best to treat your dog with a year-round heartworm preventive. Heartworm medication targets infective larvae from mosquitoes in the last 30 days.
Treat your dog with heartworm pills every 30 days or about the same time every month to keep your pup heartworm-free. If you miss treatment by a few days, give the medication right away to minimize the chance of developing adult heartworms. Contact your vet if you are unsure if it's safe.
PetFriendly's convenient monthly dose serves as your reminder to treat right on time and kill any new larvae that might've made their way to your pup since the last dose.
Yes! Preventing heartworm disease is much safer than treating it. If immature heartworms enter your dog's heart or lungs, it is often irreversible and expensive to treat. Many complications during heartworm treatment can be fatal.
Unfortunately, heartworm prevention isn’t 100% effective in preventing heartworm disease. The earlier heartworm disease is detected, the sooner veterinarians can start treatment. Testing your dog each year should be a part of every dog’s check-up.
Technically, yes. Mosquitoes can transfer immature heartworms from one infected animal to another intermediate host. To keep heartworm at bay, make sure you give your dog heartworm prevention every 30 days.
Yes! It only takes one bite from an infected mosquito. Your dog is at risk of infection anytime mosquitoes are around. Even a quick bathroom break outdoors is enough time for a mosquito to bite.
Start by reducing mosquito exposure in your area. If you live along gulf coasts, eliminate standing water where mosquitoes can breed and avoid or limit outdoor exposure during peak mosquito feeding season and times.
Most importantly, use monthly prevention and get your dog tested yearly. This can include topical treatment for fleas, ticks, and lice to protect your pets from other parasites. Your veterinarian can help you determine the right heartworm prevention plan.