
I went on line and found this solution at Drs. Foster and Smith. The cover for the back seat is a hammock. The straps fit over the headrests in the back and front seat. The part on which she is sitting is plush too. It's totally washable and can go in the dryer. The next step was to keep her safe in an emergency. I found this plush lambs wool harness that ties into the seat belt system in the backseat of my Prius. If you ask me she looks pretty cool.
Kerry thought she would hate the harness, but I just laid it on the floor and put some treats on it; she decided this would be just fine. So we have an alternative to the crate.