Designed exclusively for extra-large dogs over 25kg, Advantix Dog Extra Large Grey is one of the best products for treatment and prevention of fleas. Its special, innovative formula provides protection against fleas, ticks, as well as a range of biting insects, including stable flies, sand flies and mosquitos. Developed to be your only spot-on treatment, Advantix Flea and Tick's rapid effect stops flea bites within 3 to 5 minutes, and kills adult fleas and their larvae within 20. By breaking the flea lifecycle, Advantix Flea and Tick treatment successfully eliminates all parasites before they've had the chance to harm your dog - the best approach for getting rid of fleas. Applied fortnightly, Advantix Dog Extra Large Grey is also water-resistant, providing superior and effective protection against any harmful insects, fleas and ticks and helping your dog feel happy, joyful and healthy! Please note that Advantix is toxic to cats. Keep cats separated from recently treated dogs for 48 hours. Looking for some treats to encourage and reward your dog for taking his or her medication? Check out our range of gourmet dog treats here!