Costco – Kirkland Signature Flea & Tick Control for Dogs by Rhonda March 9, 2021 *UPDATE* 3/27/14. Costco has the Kirkland Signature Flea & Tick Control for Dogs (6 Doses) on sale for $14.99 (after manufacturer’s instant rebate), now through April 13, 2014. That is $5 off … 0 FacebookTwitterPinterestEmail