🐶 Keep your furry friend safe and stylish! Starts working within 12 hours for immediate relief. Two monthly applications for lasting defense. Effective protection for every season. Kills fleas, ticks, and mosquitoes on contact. Easy topical application for hassle-free care. 2-month protection kills on contact works in 12 hours Bayer K9 Advantix II offers robust flea, tick, and mosquito prevention for medium dogs (11-20 lbs) with two monthly applications. This easy-to-apply topical solution starts working within 12 hours and provides effective year-round protection.