Mine got car sick also. Once I started having them higher in a seat able to look out, they did much better. We are in class right now. My instructor said that she normally has a 5 mo old cut off time. She let us in since Hot Rod is so little - 2.8 lbs.- 6 1/2 mos when we started. The other pups are anywhere from 9 weeks to 4 1/2 mos.