The image of a dog sticking his head out the car window is iconic. Even though it’s unsafe because it means he’s not safely secured in his seat, most dogs love to feel the wind on their face as the vehicle rushes along. Yet a small but significant minority of dogs feel nauseated during car rides, literally. They hunker down for what’s going to be a grim experience. They whine, pace, or smack their lips. Some drool or vomit.