Does your dog suffer through car rides to the dog park only to feel too lousy for playtime? Does your cat howl on the train to the vet because her tummy is doing somersaults? Yep, pets can get motion sickness, too. Boats, cars, trains and buses—the same vessels that can cause motion sickness in people—could be giving your pet a nasty time. Bottom line: Travel can make pets sick. Here’s what you need to know and how to help them.