SENTRY Natural Defense Natural Flea and Tick Squeeze-On for Dogs and Puppies kills fleas, ticks and mosquitoes for up to four weeks, yet it's safe to use on your dog or puppy and around your family when applied as directed. Each carton contains three monthly applications that feature natural active ingredients such as peppermint oil, cinnamon oil, lemon grass oil and thyme oil. Kills and repels fleas, ticks and mosquitoes with natural ingredients All Natural Ingredients Kills fleas and ticks on contact Safe for use around children and pets Four applicationsUSA