I have a friend who has a 4 month old boxer who JUST started to show signs of car sickness. He got him at 2 months and drove him home 40 miles no issues.went to vets 10 miles no issue back to vets at 3 months car sick 1x on way 2 x on way home last trip to vet 1x sick on way home. I have never had a dog that got carsick is there any cures? Might he grow out of it? Any and all hints ideas Thanks Nick