---
title: "Heartworm Prevention for Dogs — $1.2M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/heartworm-prevention-for-dogs"
last_updated: "2026-07-21T17:41:09.708Z"
locale: en
meta:
description: "Niche score 54/100 · $1.2M/yr market · 1.1M searches/yr. A deep review moat (12,052 avg reviews) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $1.2M/yr market · 1.1M searches/yr. A deep review moat (12,052 avg reviews) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Heartworm Prevention for Dogs — $1.2M/yr Amazon US Niche (2026) - Flapen"
---
# **heartworm prevention for dogs**
**Worth a look**
Shows low returns (0.2%), but a deep review moat (12,052 avg reviews) keeps it on the watch list.
Market size 82Growth 29Conversion 31Competition 63Returns 99Price range 74Avg price 95Brand share 28Review moat 21Quality gap 27
**Returns**
**Incredible****0.2%**
return rate — above 6% kills the launch gate
**Avg price**
**Incredible****$46.14**
avg listing price — sweet spot $15–$100
**Market size**
**Great****$1.2M**
$1.2M/yr · 1.1M searches
**Price range**
**Good****$12.72–$128.07**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****47%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Okay****2.5%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Okay****+3.1%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****12,052.24**
avg incumbent reviews — the moat a new listing must climb
According to Flapen's Amazon United States niche tracking, heartworm prevention for dogs is a $1.2M/yr Amazon United States market (1.1M searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Apr–May. Verdict: Worth a look — 54/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **heartworm prevention for dogs market data**
- **Units sold / yr**
- **20K–25K**
- avg 750–1,000/product
- **Revenue / yr**
- **$923K–$1.2M**
- units × avg price
- **Launch success**
- **—**
- 0 of 3 new (360d)
- **Conversion rate**
- **2.5%**
- **Avg BSR**
- **#31**
- **Page quality**
- **0%**
- **Prime**
- **42%**
- **Sponsored**
- **85%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **57 months**
- **Avg seller age**
- **152 days**
## **Competition & brand share**
The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**13 **▲rising
**Sellers**
**49**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**47%**
Top 20: 89%
**Open market**
**8%**
- HEARTGARD52% - PetArmor12% - Nexgard9% - TRI-HEART PLUS9% - Simparica Trio6% - Frontline3% - Open — no brand owns it (7 brands, 8%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +3.1% search growth over the last 90 days.
50K30KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May · busiest ÷ quietest = 3.3×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/heartworm-prevention-for-dogs/trend)
## **Top heartworm prevention for dogs search terms**
- **heartworm prevention for dogs**343K/yr+24.5%1.5% conv. - **heartgardplus**217K/yr-36.5%0.0% conv. - **heartgard plus 0-25 lbs**109K/yr+8.9%4.0% conv. - **heartgard for dogs**53K/yr+176.5%2.8% conv. - **dog heartworm prevention**63K/yr+23.3%1.6% conv. - **heartworm medicine for dogs**51K/yr+18.7%1.4% conv. - **heart worm medicine for large dogs**36K/yr+16.9%2.0% conv. - **heart guards for dogs chewable**33K/yr+16.9%2.6% conv. - **heartgard**34K/yr+11.7%2.4% conv. - **heartguard**27K/yr+6.1%2.6% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/heartworm-prevention-for-dogs/search-terms)
## **Top heartworm prevention for dogs products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%4%$50K8%$99K12%$149K16%$199K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 33 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs 51-100 lbs (Brown Box) 6 Month Supply of Chews (Heartworm Disease Preventive)**HEARTGARD**$86.60**4.8★175 rev](https://www.amazon.com/dp/B00487WDKQ) [2**HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs up to 25 lbs (Blue Box) 6 Month Supply of Chews (Heartworm Disease Preventive)**HEARTGARD**$57.72**4.9★401 rev](https://www.amazon.com/dp/B0080B193I) [3**HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs up to 25 lbs (Blue Box) 1 Month Supply of Chews (Heartworm Disease Preventive)**HEARTGARD**$12.72**4.9★401 rev](https://www.amazon.com/dp/B0DYGB1NGN) [4**PetArmor 7 Way De-Wormer for Dogs Oral Treatment for Tapeworm Roundworm & Hookworm in Large Dogs & Puppies (Over 25 lbs) Worm Remover Puppy Dewormer (Praziquantel & Pyrantel Pamoate) 2 Chewables**PetArmor**$18.31**4.6★33,281 rev](https://www.amazon.com/dp/B07CXQQ4Q5) [5**HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs 51 -100 lbs (Brown Box) 1 Month Supply of Chews (Heartworm Disease Preventive)**HEARTGARD**$17.95**4.8★84 rev](https://www.amazon.com/dp/B0DYG484H7)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Young Heart for Dogs lvermect Tablets for Dog Hawthorn Prevention for Dogs Heart Health Circulatory & Cardiovascular System 7.5 mg 100 Tablets**AETHER**$37.85**26 rev4mo ago](https://www.amazon.com/dp/B0GS8V1WQH) [**Faith Love Hope Hawthorn & Dandelion Herbal Formula**Faith Love Hope**$24.37**5 rev7mo ago](https://www.amazon.com/dp/B0G7JFKD5N) [**Young Heart for Dogs DogHeart Support Drops with Hawthorn & Motherwort Fast-Absorbing Liquid Supplement for Heart & Circulation Support Daily Cardiovascular Wellness & Vitality 2 fl oz / 60 mL**Nexalo rithu**$29.90**3 rev9mo ago](https://www.amazon.com/dp/B0FSL8C35S) [**Simparica Trio (sarolaner moxidectin and pyrantel chewable Tablets) Chewables for Dogs 48 mg/tab 44.1-88 lbs (Green) 1 Tablet**Simparica Trio**$43.59**281 rev1y ago](https://www.amazon.com/dp/B0DVB19C14) [**Simparica Trio (sarolaner moxidectin and pyrantel chewable Tablets) Chewables for Dogs 72 mg/tab 88.1-132 lbs (Brown) 1 Tablet**Simparica Trio**$44.23**55 rev1y ago](https://www.amazon.com/dp/B0DV9ZFMT6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**TUOYR Padded Compression Shirt Chest Protector Heart Guard Sternum Protective Sleeveless Vest for Football Baseball Lacrosse and Goalies - Youth & Adult Sizes Black-White**TUOYR**$23.27**4.4★**▲ 192%**](https://www.amazon.com/dp/B09VPC2BQ5) [**Faith Love Hope Hawthorn & Dandelion Herbal Formula**Faith Love Hope**$24.37**4.6★**▲ 192%**](https://www.amazon.com/dp/B0G7JFKD5N) [**Young Heart for Dogs lvermect Tablets for Dog Hawthorn Prevention for Dogs Heart Health Circulatory & Cardiovascular System 7.5 mg 100 Tablets**AETHER**$37.85**4.1★**▲ 190%**](https://www.amazon.com/dp/B0GS8V1WQH) [**Simparica Trio (sarolaner moxidectin and pyrantel chewable Tablets) Chewables for Dogs 72 mg/tab 88.1-132 lbs (Brown) 1 Tablet**Simparica Trio**$44.23**4.7★**▲ 163%**](https://www.amazon.com/dp/B0DV9ZFMT6) [**HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs 51 -100 lbs (Brown Box) 1 Month Supply of Chews (Heartworm Disease Preventive)**HEARTGARD**$17.95**4.8★**▲ 147%**](https://www.amazon.com/dp/B0DYG484H7)
**~~View all trending →~~**
## **What buyers say about heartworm prevention for dogs**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**21%
*“Great product and easy to purchase”*
**Value For Money**19%
*“Excellent Value”*
**Ease Of Use**13%
*“Easy and convenient”*
**Advertised Vs Actual Product**12%
*“Does what it says”*
**Pet Friendly**9%
*“Great for your pet”*
**Allergies**3%
*“It does not cause any skin irritation”*
**Ease Of Chewing/Swallowing**2%
*“chew them without any fuss”*
**Taste-Overall**2%
*“My dogs like the taste”*
**Smell**2%
*“no odor notice”*
**Strength**2%
*“Solid and trustworthy”*
### **What buyers complain about **
**Functionality-Overall**50%
*“Doesn't work”*
**Value For Money**9%
*“A little to expensive”*
**Allergies**8%
*“Caused Seizures”*
**Indigestion**6%
*“Side effects were vomiting and diarrhea”*
**Durability**5%
*“Not long lasting”*
**Advertised Vs Actual Product**3%
*“This product is not what it is supposed to be”*
**Ingredients-Overall**2%
*“Wasn't the same ingredients as the ones I bought at Costco”*
**Quality-Overall**2%
*“Cheap, useless product”*
**Smell**1%
*“The Product stinks”*
**Instructions/User Manual/Troubleshooting**1%
*“Great product, lacking instruction”*
### **Top return reasons **
**Size-Overall**33%
**Value For Money**20%
**Functionality-Overall**19%
**Advertised Vs Actual Product**11%
**Ease Of Chewing/Swallowing**3%
**Defective Material/Parts**3%
**Leak-Proof**3%
**Certifications**1%
**Weight Heavy**1%
**Product Condition**1%
## **Common questions**
- **Is heartworm prevention for dogs profitable to sell on Amazon United States?**
- The niche generates $1.2M/yr across 33 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +3.1%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the heartworm prevention for dogs niche?**
- 13 brands and 49 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 88% of demand.
- **What do buyers complain about in heartworm prevention for dogs?**
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Allergies. The return rate is 0.2%.
- **When does demand for heartworm prevention for dogs peak?**
- Demand peaks in Apr–May; the busiest month runs 3.3× the quietest.
- **What does it cost to enter the heartworm prevention for dogs niche?**
- Listings span $12.72–$128.07; the average listing price is $46.14 (sweet spot $15–$100). The average incumbent carries 12,052 reviews — the moat a new listing must climb.
## **Related niches in Pet Supplies**
- 73 [**phosphate test kit**](https://flapen.com/research/us/pet-supplies/phosphate-test-kit)$194K/yr+152.5%**Worth a look**- 73 [**flea repellent for dogs**](https://flapen.com/research/us/pet-supplies/flea-repellent-for-dogs)$1.7M/yr+136.7%**Launch it**- 73 [**kitten bottles for nursing**](https://flapen.com/research/us/pet-supplies/kitten-bottles-for-nursing)$457K/yr+166.2%**Worth a look**- 73 [**dog stake**](https://flapen.com/research/us/pet-supplies/dog-stake)$573K/yr+55.9%**Worth a look**- 73 [**bully sticks**](https://flapen.com/research/us/pet-supplies/bully-sticks)$12.4M/yr-6.9%**Worth a look**- 73 [**pet oral tartar remover spray**](https://flapen.com/research/us/pet-supplies/pet-oral-tartar-remover-spray)$100K/yr>1,000%**Worth a look**[**All Pet Supplies niches **](https://flapen.com/research/us/pet-supplies)