Our rankings are generated through the algorithmic analysis of thousands of customer reviews about products, brands, merchant customer service levels, popularity trends, and more. We use advanced technology, including AI, to help process and organize this information at scale, supporting our analysis with greater speed and consistency. The rankings reflect our opinion and should be a good starting point for shopping.
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10 Best flea meds for dogs of 2026
Save up to 16% off
Best Choice1
K9 Advantix9.9Exceptional
K9 Advantix II XL Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 lbs. | 2-Mo Supply
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is discontinued by manufacturer:No
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manufacturer recommended age:1 month and up
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product dimensions:1 x 4.38 x 4.75 inches; 1.13 ounces
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asin:B00I0BWNUG
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date first available:January 23, 2014
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Value for Money2
Capstar9.7Exceptional
Capstar for Dogs (nitenpyram), Fast-Acting Oral Flea Treatment for Dogs Over 25+ lbs, Vet-Recommended Flea Medication Tablets Start Killing in 30 Minutes, 6 Doses
Limited Time Deal-
is discontinued by manufacturer:No
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product dimensions:0.63 x 5.75 x 4.5 inches 0.32 ounces
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country of origin:Switzerland
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asin:B07PWB9J43
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date first available:July 25, 2014
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3
Frontline9.4Excellent
FRONTLINE Plus Flea & Tick Spot Treatment for Large Breed Dogs 45-88 lbs. (Purple) Count of 3
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is discontinued by manufacturer:No
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manufacturer recommended age:1 month and up
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product dimensions:5.75 x 0.75 x 4.5 inches 1.6 ounces
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asin:B0002J1FOE
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date first available:September 2, 2004
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4
K9 Advantix9.3Excellent
K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 2-Mo Supply (Packaging may vary)
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is discontinued by manufacturer:No
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manufacturer recommended age:1 month and up
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product dimensions:1 x 4.38 x 4.75 inches; 0.1 ounces
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asin:B00N7DEBN4
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date first available:September 1, 2014
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5
K9 Advantix9.2Excellent
K9 Advantix II XL Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 lbs. | 4-Mo Supply
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is discontinued by manufacturer:No
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manufacturer recommended age:N/A
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product dimensions:7.75 x 1 x 4.25 inches 2.08 ounces
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asin:B004QREOPU
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date first available:October 5, 2004
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6
K9 Advantix9.0Excellent
K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 2-Mo Supply
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is discontinued by manufacturer:No
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manufacturer recommended age:N/A
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product dimensions:1 x 4.38 x 4.75 inches 0.32 ounces
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asin:B00I2266Y2
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date first available:January 26, 2014
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7
PetArmor8.8Very Good
PetArmor Plus Flea and Tick Prevention for Dogs, Small Dog Flea and Tick Treatment, 3 Doses, Waterproof Topical, Fast Acting (5-22 lbs)
16% Off Limited Time Deal
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8
K9 Advantix8.6Very Good
K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21 - 55 lbs. | 4-Mo Supply
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is discontinued by manufacturer:No
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manufacturer recommended age:N/A
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product dimensions:7.75 x 1 x 4.25 inches; 1.45 ounces
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asin:B004QMX4YW
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date first available:March 4, 2011
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9
Capstar8.5Good
Capstar (Nitenpyram) Fast-Acting Oral Flea Treatment for Dogs 2-25 Lbs, Vet-Recommended Medication Tablets, Flea Tablets for Dogs Start Killing in 30 Minutes, 6 Doses
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10
PetArmor8.2Good
PetArmor Plus Flea & Tick Topical Dogs 45-88 lbs, 3-Month
16% Off Limited Time Deal
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