Travel sickness is quite common in dogs. It is mostly seen in puppies under 1 year old and thankfully many dogs seem to outgrow it as they age. Travel sickness in dogs can be a combination of mismatched vestibular signals from the inner ear from motion which creates nausea, and also many dogs also have a component of anxiety associated with car trips.
Some of the signs you may see if your dog has motion sickness is mild lip licking, yawning, whining, reluctance to get into the car and vomiting. In some dogs the vomiting can be quite severe.
Management of travel sickness often requires a combination of 3 approaches: