Sentry Flea & Tick Squeeze-On for Dogs is an effective and easy to use product. The product has demonstrated greater than 92% control of fleas within on day of application. It prevents eggs from fleas on treated dogs from developing into biting adults for up to 3 months. As with all flea and tick control products, Sentry Flea & Tick Squeeze-On for Dogs should be used as part of a program aimed at reducing flea populations in the dogs' environment (bedding, carpets, kennel, yard). Consult your veterinarian, entomologist, or retailer for program recommendations. Control kills and repels fleas, ticks and mosquitoes for up to 1 month per application.