It's a shame when your pup is not keen on car travel, but some just are not happy with it. We have had 5 dogs and only 3 would travel. Although crated is safer, try a rear seat belt attachment so it can see you. There are pills and potions on the market but can not recommend any. Tried pills on our staffy but she still whinned, panted and steamed the car up on our 5 hour drive to our new house