Wondercide - Flea & Tick Shampoo for Dogs and Cats - Flea and Tick Killer Treatment with Natural Essential Oils - for Pets Over 4 Months - Powered by Plants - 12 Fl oz Review
By Dr. Lena Ortiz · Canine wellness writer · Published 2026-05-31 · Updated 2026-07-04
4.4(2,300)Amazon rating$19.994,000+ bought last month
Our verdict
Wondercide's Flea & Tick Shampoo is a peppermint-scented, plant powered formula built around cedarwood oil for pets over 4 months old, and with 4,000 units bought in the last month it's clearly one of the most popular shampoos in this whole category.
Owners of dogs or cats over 4 months old who want a flea and tick shampoo built on natural essential oils rather than a synthetic pesticide formula.
Skip if
You have a puppy or kitten under 4 months old, since this formula is labeled for pets older than that.
Form Liquid
Weight 12 Ounces
Priced 18% above the category median ($16.99 across 131 tracked models)
Our scorecard
4.4/5overall
Owner rating4.4/5
4.4 average across 2,300 owner ratings
Popularity3.2/5
2,300 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog and cat food, health, gear and grooming we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
['This shampoo is marketed as a flea and tick killer treatment built around natural essential oils, with cedarwood oil listed as the active ingredient. Wondercide positions its lineup as plant powered, which is the main draw for owners who want to avoid harsher synthetic pesticide shampoos.', "It's labeled drug-free and suitable for pets over 4 months old, and it covers both dogs and cats, which is handy for multi-pet households that would otherwise need two different shampoos. The scent is peppermint, and it comes in a 12 fluid ounce bottle.", "At $19.99, it's mid-priced for the category, but the numbers tell the real story: 2,300 reviews, a 4.4 star average, and 4,000 units bought in the last month, plus rankings of #4 in Cat Shampoos and #20 in Dog Shampoos, make this one of the best-selling shampoos in this entire batch."]
Pros
Plant powered formula with cedarwood oil as the active ingredient
Works for both dogs and cats over 4 months old
Drug-free formula
Very high recent demand, with 4,000 bought in the last month
2,300 reviews with a 4.4 star average
Cons
Not labeled for puppies or kittens under 4 months old
12 fluid ounce size is smaller than some competing bottles
Essential oil based formulas can be less potent against heavy infestations than stronger chemical treatments
Specifications
Form
Liquid
Weight
12 Ounces
Performance notes
Cedarwood oil is the named active ingredient here, and the drug-free, plant powered positioning is aimed at owners who'd rather manage fleas and ticks with essential oils than a synthetic pesticide. Working across both dogs and cats over 4 months old adds flexibility for mixed-pet households, though the 12 ounce size means more frequent reordering for larger dogs or multiple pets.
What buyers say
With 2,300 reviews, a 4.4 star average, and 4,000 units bought last month, this is one of the highest-demand shampoos in this batch, backed by top rankings in both the cat and dog shampoo categories.
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