Kills fleas and ticks, including the Deer Tick, which has been known to carry Lyme disease. This is an 18-ounce bottle. For use only on dogs. I don't have "regular" shampoo for my dogs and I don't bathe them often. People who plunk their poodle down in the kitchen sink every week for a bath do their pet's coat and skin more damage than they realize. Anyway, since they don't get baths very often I figured we might as well use a shampoo that killed fleas and ticks as well as made them smell good.