You should have some way of restraining your dog in the car. This is for your own safety as well as your dog’s.
An unrestrained dog that climbs everywhere may get into the driver’s lap and cause havoc. An unrestrained dog that likes to chew may destroy the interior of the car. Even an unrestrained dog that lies quietly may be severely injured if you get into an accident.
There are several types of restraints:
There are a variety of restraints that use the harness and the seat belt to restrain the dog. One of them is the EzyDog CLICK, pictured above and available on Amazon.com.
You can purchase metal screens that fence off an area of the car for your dog. These are usually used in trucks, sporting vehicles, vans, and station wagons.
You can get a crate to fit your dog and keep it in your car. This is not feasible for everyone, especially the larger your dog is and the smaller your vehicle is, but is probably the safest method of restraint.
There are various ways to restrain a dog in the back of a pickup truck. These are generally not advisable, but some people do use them. But if your dog must ride in the back of a pickup, do use some type of leash.
Crates, fastened down, are even better.
You can even use a leash: Clip it on your dog, and either tie the other end to an armrest on the door, or close the door on a loop of it in such a way that the dog’s mobility is quite restricted.
Not the best long-term solution, but it can help in a pinch.