While some dogs love the open road, many pets -- dogs and cats included -- associate car trips with unpleasant events like an outing to see the vet and become anxious at the prospect of any trip. Think shedding, biting, bladder accidents and howling.
Alleviating your pet's nervousness by taking short car trips to fun destinations (such as on a playdate or to the park) may help change those negative associations. And a few, "Good, boy" reassurances won't hurt. If all else fails, talk to your vet. There are medicines and products designed to help ease your pet's fears.