My skittles has motion/car sickness BADLY. I discovered that it was usually on the trip back HOME that he usually vomitted (after having gone to the vet or to get bathed). Originally, I thought he was associating the car with bad experiences. He's only 14 weeks old. I recently started putting him in the car (without it running), bringing his toys and a treat so that he would start to feel comfortable with the car. Then the next week I did the same thing, but with the car running. The next week, I began driving back and forth in the driveway. This week, we've taken trips around the block. He seems to be doing pretty well with it. No vomit so far. My vet suggested this method, but said if it didn't work, he'd prescribe something for motion sickness.