there are other brands but i used frontline for fleas &ticks. either oral or a liquid you place between the shoulderblades onto the dogs skin. it coats the entire surface of the dogs skin and gets into the bloodstream. the ticks will not attach and they want to get the hell out of there!as fast as possible! yeah a tick could of fell off my dog onto someone else in a shelter perhaps but lets be fair a tick could fall off another hiker and end up on you also.