Keep furry friends safe and more comfortable when using Hartz Ultra Guard Plus Topical Flea and Tick Prevention. it s an effective way to kill fleas deer ticks and flea eggs as well as repels mosquitoes for less chance of disease and irritation. The Hartz Ultra Guard flea and tick prevention system has three monthly treatments and starts killing insects in just 15 minutes. The easy-to-use applicator helps cats and kittens 5 lbs and over and 12 weeks of age and older get rid of those annoying fleas and ticks quickly. The flea and tick prevention for cats is ideal for home or outdoor felines. Be a responsible pet owner and keep them healthy with this handy product.