Natural Flea & Tick Shampoo combines natural botanical ingredients that work synergistically with one another to provide effective, natural and safe flea & tick protection. Natural Flea & Tick Shampoo for Dogs has been proven to provide residual killing and repelling of fleas, tick, black flies and mosquitoes, for up to 7 days. Natural Flea & Tick Shampoo for Dogs does not contain Pyrethrins or similar chemicals. Naturally Kills and Repels. Natural botanical formula. Contains Cinnamon Oil, Cedar Wood Oil, Clove Oil, and Vanillin. Kills and repels fleas & ticks. Documented residual for up to 7 days.