Millie, my cocker spaniel, has been with me long enough now that we know each other pretty well and I trust her completely. Having spent the early part of her life travelling around in the back of the car, confined to a dog crate, she is very relaxed while on the move.
But the transportation of dogs is something that varies greatly from owner to owner and from dog to dog. The type of journey, the type of dog, its behaviour and how much time it is to spend in the vehicle are merely some of the many factors that have to be taken in to consideration when putting a dog in the car.
I had Millie as a puppy when I was a lowly graduate rural surveyor