SENTRY Natural Defense products are highly effective, yet they’re safe for use around your pets and your family when used as directed. Over hundreds of millions of years, certain plants have developed highly effective defense mechanisms against potentially harmful insects. Now, SENTRY has harnessed the power of these natural botanical extracts to produce a line of flea, tick and mosquito control products that features natural active ingredients such as peppermint oil, cinnamon oil, lemon grass oil and thyme oil. The exclusive formulations that feature these ingredients are harmless to mammals, birds and fish — but they’re deadly to biting pests.