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Sentry FiproGuard Plus is a topical spot-on flea and tick treatment for large dogs in the 89-132 lb range. It uses fipronil plus (S)-methoprene, the same active ingredients as Frontline Plus, to kill adult fleas and ticks and stop flea eggs and larvae from developing. It comes in single-dose applicators applied between the shoulder blades once a month. It suits owners of large dogs who want a lower-cost alternative to brand-name spot-ons; the trade-off is that some dogs show skin irritation at the application site, and it does not repel ticks or mosquitoes the way some newer oral products do.
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Lowest price we've seen: $33.99 on Nov 11 at Chewy. Tracked across 1 store since Nov 11.
Owners of large dogs generally find it works as well as the brand-name spot-on for fleas, and many switch to it for the lower cost. Complaints center on skin irritation at the application site and on ticks that still attach before dying.
Sentry FiproGuard Plus is a flea and tick spot-on product for dogs. It is intended for adult dogs and comes in the 89-132 size.
