Carsickness in puppies is a common occurrence, and it is often related to a still-immature inner ear. Thankfully, most puppies usually outgrow it by the age of six months. A little work into making sure your canine pal is happy and relaxed in a moving vehicle can help. Limit your dog becoming sick in a car as much as possible. A dog who has vomited in a car a few times immediately associates the car with being sick. ​ Some signs that the dog is becoming ill are: · cons