Kills Fleas, Ticks, Mosquitoes, plus Flea eggs. Faster acting; Longer lasting. 3 Month supply. Kills 95% of fleas and repels 96% of Ticks within 24 hours. Hartz Advanced Care Brand Flea and Tick Drops Plus for Cats and Kittens is the monthly treatment that effectively controls flea and tick infestations. This gentle formula kills and prevents adult flea, ticks and mosquitoes. Plus flea eggs and larvae thereby breaking the flea life cycle. It is also waterproof.