Is Sergeant's Guardian safe for cats?

No. It contains permethrin, which is highly toxic to cats. Keep treated dogs away from cats until the product dries, and never apply it to a cat.

How often do I apply it?

Once a month, up to 30 days per dose. The box gives a three-month supply, so one box covers a full quarter.

Will it work if my dog swims or gets rained on?

The formula is waterproof once dry, so swimming and rain should not wash it off. Wait about 48 hours after application before bathing the dog.

What weight of dog is this for?

Dogs from 33 to 66 lbs, over 12 weeks old. Smaller or larger dogs need a different weight-band product.

Does it kill ticks as well as fleas?

Yes. It targets fleas, ticks and mosquitoes, and S-Methoprene stops flea eggs and larvae from developing.

Is $5.49 a good price?

It is the lowest new price among the four stores listing it as of November 4, 2026. Confirm whether that price is for one tube or the three-count box before comparing.

Where can I buy the Sergeant's Guardian Flea & Tick Topical for Dogs?

4 stores we checked sell it, including PetPawsRx, Walmart, Atwoods Ranch & Home Goods, McCoy's Building Supply.

Sergeant's Guardian Flea & Tick Topical for Dogs

Q: Where is the Sergeant's Guardian Flea & Tick Topical for Dogs cheapest?

At Atwoods Ranch & Home Goods, for $5.49, as of our latest check.

Best price now

$5.49at Atwoods Ranch & Home GoodsObserved at 5:37 AM

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Our take on the Sergeant's Guardian Flea & Tick Topical for Dogs

A three-month supply of monthly topical flea and tick drops for dogs weighing 33 to 66 lbs. It combines permethrin at 45% with S-methoprene, which stops flea eggs and larvae from developing, so it breaks the flea life cycle rather than only killing adult fleas. The formula is quick-drying and waterproof and also targets mosquitoes. At $5.49 at Atwoods Ranch & Home Goods as of November 4, 2026, it is a low-cost option, though the price is for a single tube or pack rather than the full three-count box, so check the quantity.

Best forOwners of medium-to-large dogs (33–66 lbs)