Hi Rich, I have two Schnauzers and when we take them in the Explorer we always put seat belts on them. I got mine from Petsmart, they are called "Easy Rider" car harness and they are not that expensive. They have a loop and you hook the seatbelt throught the loop. The front of the harness is padded some. They work very well and they can also lay down or sit up. Welcome to PetTalk, what kind of dog do you have? or maybe I missed you telling us allready.