At times it is neccessary to keep our dogs in the car on cooler days and the preference is not to have the car all closed up. I am wondering if anyone has rigged something so that you can leave your dogs in the car, tailgate up, back window open. Something that can keep the dogs from getting out over the tailgate. Our dogs are too big to crate, as this would eleviate the problem all together, but we can't fit three crates. As long as the back is wide open airflow is sufficient on days that are about 70 degrees or less. I know there are tie down hooks, but I can't find a good fitting cargo net for that size area.