Get your dog used to the car environment
Get in the car together and have a treat. Talk. Be happy. Make it a fun time. Do not have the car running, just share a treat and make it a positive experience. Repeat this a number of times on different occasions. You may want to feed your dog in the car. If your dog is afraid of even getting into the car, try feeding or giving a treat close to the car.
Get your dog used to the car while it is running
Repeat step one, only this time start the car. Give a treat before and after. If she looks or acts nervous, reassure her that everything is OK. Take your time and make sure she is relaxed before ending the session.
Get your dog used to the motion of the moving car
Once she is used to the car running without any fearful reaction, back the car to the end of the driveway, then forward again to the garage. Give her a treat and praise her. Repetition is the key. The more you do this the more confident your dog becomes that cars are no problem. In fact, to her it becomes a great place for attention, praise, and even treats.
Now it is time to take a short trip around the block
Treats and praise before and after, and calm, reassuring talk throughout the ride are a pre-requisite. Gradually increase the distance traveled until your dog is calm no matter how long she’s in the car.
Some animals still need something to calm them. There are non-prescription products such as Serene-um, Pet Calm, and Rescue Remedy. In severe cases, your veterinarian can dispense even stronger prescription anti-anxiety medications.
Get puppies used to the car while they are still young and are more receptive to new adventures. Dogs make excellent traveling companions so it is well worth the training now for the years of enjoyme, t it will bring both of you once you get over this obstacle together.