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.

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.

Returns

Incredible0.2%

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

Good47%

top-5 click share — leaders hold, buyers still browse

Conversion

Okay2.5%

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

Okay88%

top-5 brand share — brands hold most of the demand

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Review moat

Bad12,052.24

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

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

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

47%

Top 20: 89%

Open market

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.

Peak months: Apr, May · busiest ÷ quietest = 3.3×

Open Trend

Top heartworm prevention for dogs search terms

heartworm prevention for dogs343K/yr +24.5%1.5% conv.
heartgardplus217K/yr -36.5%0.0% conv.
heartgard plus 0-25 lbs109K/yr +8.9%4.0% conv.
heartgard for dogs53K/yr +176.5%2.8% conv.
dog heartworm prevention63K/yr +23.3%1.6% conv.
heartworm medicine for dogs51K/yr +18.7%1.4% conv.
heart worm medicine for large dogs36K/yr +16.9%2.0% conv.
heart guards for dogs chewable33K/yr +16.9%2.6% conv.
heartgard34K/yr +11.7%2.4% conv.
heartguard27K/yr +6.1%2.6% conv.

All 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.

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

HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs 51-100 lbs (Brown Box) 6 Month Supply of Chews (Heartworm Disease Preventive)

HEARTGARD$86.604.8★175 rev

HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs up to 25 lbs (Blue Box) 6 Month Supply of Chews (Heartworm Disease Preventive)

HEARTGARD$57.724.9★401 rev

HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs up to 25 lbs (Blue Box) 1 Month Supply of Chews (Heartworm Disease Preventive)

HEARTGARD$12.724.9★401 rev

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$18.314.6★33,281 rev

HEARTGARD Plus (ivermectin/pyrantel) Real-Beef Chewables for Dogs 51 -100 lbs (Brown Box) 1 Month Supply of Chews (Heartworm Disease Preventive)

HEARTGARD$17.954.8★84 rev

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$37.8526 rev

4mo ago

Faith Love Hope Hawthorn & Dandelion Herbal Formula

Faith Love Hope$24.375 rev

7mo ago

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$29.903 rev

9mo ago

Simparica Trio (sarolaner moxidectin and pyrantel chewable Tablets) Chewables for Dogs 48 mg/tab 44.1-88 lbs (Green) 1 Tablet

Simparica Trio$43.59281 rev

1y ago

Simparica Trio (sarolaner moxidectin and pyrantel chewable Tablets) Chewables for Dogs 72 mg/tab 88.1-132 lbs (Brown) 1 Tablet

Simparica Trio$44.2355 rev

1y ago

What buyers say about heartworm prevention for dogs

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall21%

“Great product and easy to purchase”

Value For Money19%

“Excellent Value”

Ease Of Use13%

“Easy and convenient”

Advertised Vs Actual Product12%

“Does what it says”

Pet Friendly9%

“Great for your pet”

Allergies3%

“It does not cause any skin irritation”

Ease Of Chewing/Swallowing2%

“chew them without any fuss”

Taste-Overall2%

“My dogs like the taste”

Smell2%

“no odor notice”

Strength2%

“Solid and trustworthy”

What buyers complain about

Functionality-Overall50%

“Doesn't work”

Value For Money9%

“A little to expensive”

Allergies8%

“Caused Seizures”

Indigestion6%

“Side effects were vomiting and diarrhea”

Durability5%

“Not long lasting”

Advertised Vs Actual Product3%

“This product is not what it is supposed to be”

Ingredients-Overall2%

“Wasn't the same ingredients as the ones I bought at Costco”

Quality-Overall2%

“Cheap, useless product”

Smell1%

“The Product stinks”

Instructions/User Manual/Troubleshooting1%

“Great product, lacking instruction”

Top return reasons

Size-Overall33%

Value For Money20%

Functionality-Overall19%

Advertised Vs Actual Product11%

Ease Of Chewing/Swallowing3%

Defective Material/Parts3%

Leak-Proof3%

Certifications1%

Weight Heavy1%

Product Condition1%

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.