When I a say separation anxiety, I am not talking about the dog who gets nervous when you leave him alone in the car. Don’t leave your dog in the car unattended. By separation anxiety in the car, I am talking about the dog who insists on trying to get in the front seat while you’re driving. He may even try to get in your lap. This is a dangerous distraction.
You can try the dog seatbelt to keep him in place. Work with your dog wearing the dog seatbelt at home first so that he doesn’t try to chew it off. He can wear his harness around the house under your supervision. Play with him while he is wearing it. Take him for walks in it. This way, by the time he gets in the car with it, he may not realize he has it on. Take him for short rides at first just to make sure he doesn’t try to chew the strap which connects his dog seatbelt to the car.
You can also consider a pet car barrier. Depending on the size of your dog and your car, you can use the smaller canvas pet car barrier called the Front Seat Barrier by Outward Hound, or you can use the larger more extensive pet car barrier like the T-Flex pet car barrier or the Hatchbag Pet Net. Be careful because a determined dog may be able to circumvent these devices.
You may also be able to help a dog with separation anxiety by having someone sit in the back seat with him. Or try giving him his favorite toys or something familiar like his dog bed. Be careful about giving him toys he can chew apart. Trying to seat something in a moving vehicle is probably not a good idea for a dog. You wouldn’t want him to choke on something if you have to make a sudden stop or turn.