Wondercide Natural & Organic Flea & Tick Spot Drops Replacement Kit for Dogs, Lemongrass Lemongrass scented Flea & Tick Control for Pets + Home replaces flea & tick drops & pills. Safely kills & repels fleas & ticks without harsh chemicals. Control fleas, ticks, mosquitoes & 100s of other pests. Kills pest life cycle. A key ingredient, cedar oil works by blocking octopamine, which is necessary to regulate heart rate, movement, and metabolism in bad bugs like fleas and ticks. Safe for dogs & cats of all ages. Safe for the environment and around children. No artificial colors or fragrances. Therapeutic-grade essential oils. Made in the USA!