: Often features "Get 4 for the price of 3" promotions on 2-month supplies, which can significantly lower the per-dose cost if you are stocking up for the season.
Finding the cheapest place to buy depends largely on whether you prioritize bulk discounts, subscription savings, or immediate local availability. As of April 2026, Walmart often leads for small-quantity purchases, while Chewy and Petco offer significant savings through first-time subscription "Autoship" deals . Top Retailers for K9 Advantix II cheapest place to buy k9 advantix ii
: Competes closely with Chewy, offering similar 6-month pack prices of $79.99 (regularly $84.99). They also offer a 40% discount on the first "Repeat Delivery" for select flea and tick items. : Often features "Get 4 for the price