When your dog then walks through the long grass, the tick can easily drop down and reach your dog's coat. Once on the host, the tick migrates to one of its preferred sites, such as the groin area, in the ears, under the tail, between the toes, in the armpit area, etc… and there it bites into the skin. The host is not aware of this bite because the tick also injects saliva in addition to sucking blood. This saliva contains substances that, among other things, prevent blood clotting, itching and pain in the host. If a tick is not removed, for example with tick forceps, it will let go on its own when it is filled with blood.