Proven Safe and Effective When Used as Directed No Harsh Ingredients Repels Fleas, Ticks & Mosquitoes For Cats & Kittens Laboratory Tested- Veterinarian Approved Using active herbal ingredients, Dr. Mercola's Spot on Topical Herbal Repellent for Cats & Kittens effectively control fleas, ticks, and mosquitoes, reducing the number of bites. The easy-to-apply topical formula ensures safe and effective application for long-term protection.Dr. Mercola