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COSTCO 65 ITEMS ON SALE NOW for APRIL 2026πWHAT'S ON SALE, THE SALE IN BETWEEN THE SALES!
K9 Advantix II Large Dog Flea & Tick Treatment, 21-55 lbs, 8-Dose Supply
$68.99Real in-store prices from 600+ Costco locations. Download on the App Store to track prices, scan shelf tags, and get alerts.
In-store pricing snapshot
Based on recent checks across 587 Costco warehouses reporting.
* Prices shown are for Costco members only.
K9 Advantix II Large Dog is a veterinarian-recommended topical spot-on treatment for large dogs weighing 21 to 55 pounds. This 8-dose supply provides 8 months of continuous monthly protection against five types of pests: fleas, ticks, mosquitoes, biting flies, and lice. No prescription is required, and the formula is safe for dogs at least 7 weeks old.
The treatment kills fleas within 12 hours of initial application, stopping existing infestations and preventing new ones by eliminating adult fleas before they can lay eggs. It also kills all life stages of fleas, including eggs, larvae, and pupae, to break the flea life cycle. K9 Advantix II repels and kills multiple tick species, including deer ticks, American dog ticks, brown dog ticks, and Lone Star ticks, helping reduce the risk of Lyme disease and other tick-borne illnesses. Monthly use helps protect against fleas that may transmit tapeworms and cause Flea Allergy Dermatitis or flea bite anemia.
The easy-to-apply spot-on formula is fragrance-free and becomes waterproof within 24 hours of application, making it suitable for active dogs. Active ingredients are imidacloprid (8.8%), permethrin (44.0%), and pyriproxyfen (0.44%), an insect growth regulator. K9 Advantix II is a trademark of Elanco or its affiliates.
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Gina's Shopping Life
COSTCO 65 ITEMS ON SALE NOW for APRIL 2026πWHAT'S ON SALE, THE SALE IN BETWEEN THE SALES!
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Showing the 5 most recently updated Costco warehouses
| Warehouse | Price | Status | Updated |
|---|---|---|---|
Hawthorne#671β 14501 Hindry Avenue Hawthorne, CA 90250-6748 | $68.99 | In Stock | Jun 19, 2026 |
Tigard#111β 7850 SW Dartmouth St Tigard, OR 97223-8401 | $68.99 | In Stock | Jun 19, 2026 |
Owings Mills#1326β 10270 Mill Run Circle Owings Mills, MD 21117 | $68.99 | In Stock | Jun 19, 2026 |
North Canton#1635β 4953 Huckleberry St NW North Canton, OH 44720 | $68.99 | In Stock | Jun 19, 2026 |
Midland#1420β 4816 Bay City Rd Midland, MI 48642 | $68.99 | Low Stock | Jun 19, 2026 |
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Recent price trends and regional spread across Costco warehouses.
Aggregate price checks across warehouses
Lowest
$53.99
Highest
$69.49
Avg change
-$0.44 (-0.6%)
Latest average
$69.05
Average in-stock prices by state
Spread
$0.50
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Highest averages
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