PetArmor Plus Flea & Tick, Large Dog

Name: PetArmor Plus Flea & Tick, Large Dog (3-Dose)
Brand: PetArmor
SKU: B00WWP1MIK
Availability: InStock
Rating: 4.2 (60037 reviews)

Words · Craig & Sammy · ASIN B00WWP1MIK · Filed under Flea & Tick Prevention

“Mixed bag at best. Works for some dogs, completely useless for others—hard to predict which. Sammy's too small for this anyway (45–88 lbs), but I'd be wary even if he weren't.”

PetArmor Plus has earned the trust of pet parents nationwide with their effective, affordable flea and tick solutions. While this particular formula is sized for large dogs, PetArmor Plus also makes a small dog version that is perfectly suited for your Yorkie. Proper dosing is crucial for tiny breeds like Yorkshire Terriers, who typically weigh just 4-7 pounds. Using the correct size ensures your Yorkie gets effective protection without the risk of overdosing. The PetArmor Plus formula kills fleas, flea eggs, flea larvae, ticks, and chewing lice while preventing reinfestation for 30 days.

The waterproof topical application means protection continues even after bath time or rainy walks. Fast-acting ingredients begin eliminating fleas within 24 hours. For multi-pet households with both large and small dogs, PetArmor Plus offers appropriately sized formulas for everyone. Check Amazon for the small dog PetArmor Plus formula to keep your beloved Yorkie protected from parasites year-round.

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The Notes

Sizing: Sized for Yorkies 4–7 lb · check the printed chest measurement
Source: Amazon · ASIN B00WWP1MIK
Filed: Flea & Tick Prevention
Brand: PetArmor
Reviews: 4.2 · 60037 ratings
Verdict: Skip unless on sale

What owners loved

+ Easy to apply—448 of 465 users praise the simplicity; liquid format, clear directions, no fuss
+ Good value compared to vet brands—1,153 positive mentions of price, especially for multi-packs
+ Waterproof and fast-acting when it works—some users report visible flea kill within hours or a day

Watch for

− Effectiveness is genuinely a coin flip—1,961 negative mentions vs. 2,073 positive on effectiveness; nearly equal split means real product inconsistency
− Durability falls short of claims—173 negative vs. 169 positive on longevity; many report 2–3 weeks of protection instead of the advertised 30 days
− Strong chemical odor turns many users away—125 negative odor mentions; some describe it as 'intense' and 'terrible', though a minority report no smell

What owners say

From the reviews.

PetArmor Plus sits in awkward middle ground: roughly 50/50 on effectiveness, with significant complaint clusters around durability (hitting only 2–3 weeks instead of 30) and odor. Users who expect vet-brand reliability are disappointed; those treating mild infestations or using it preventatively report reasonable results. The price is genuinely competitive, but the lack of predictability means you're gambling with your dog's comfort. Cats seem to fare worse than dogs in the data.

Source · 60037 verified Amazon reviews · Average 4.2 stars

Customer questions

Things people ask.

Q01. Does this actually last 30 days like the box says? +

Not reliably. Of 342 longevity reviews, 173 are negative. Most users report 2–3 weeks of protection, with a few getting closer to 4 weeks. A minority claim the full month works.

Q02. Will my dog stop scratching after I apply it? +

Sometimes. 251 users report continued or worsened scratching despite application; 174 report relief. If your dog is already heavily infested, expect a spike in scratching for 24–48 hours as fleas die off (which is normal), but some dogs never improve.

Q03. How does this compare to Advantage or Simparica? +

Much cheaper—users cite 6 doses for roughly $30–40 vs. vet brands at $15+ per dose. But 1,961 negative effectiveness reviews suggest you often get what you pay for. It's a budget gamble, not a reliable substitute.

Q04. Does the smell ever fade? +

No. 125 users complain of intense, persistent chemical odor. 109 report minimal or no smell, but the majority who mention odor find it objectionable. Some say it lingers on their hands and the dog's coat.

Q05. Is this safe for cats? +

Users report mixed results and some skin irritation in cats specifically. One reviewer noted their cat 'scratched even worse' after application. If you have cats, check the label carefully—some topicals are dogs-only, and even cat formulations seem to underperform in this product line.

The verdict