DeeDee gets car sick too...she even got sick with an empty stomach!!! I haven't tested her recently, so I don't know if she still does. Our vet said that a lot of times dogs grow out of it. When I was younger, we had a Weimaraner who got car sick on our 600 mile trip to Wisconsin and we drugged her up so she walked like she had been on a 4 day drunk. After a few years of this, we decided to try her with no meds and she was fine and was fine every year after that, so there must be something to the growing out of it theory.