My dog is too big to keep the back seats down. I have to roll them up for fit her big arse, heh. I have a wire barrier as well, but don't use it anymore. I tend to just keep her leash on her torso harness and wrap it through the seat floor mount short enough so she stays laying down and not moving about. Not good for dogs with long legs to be standing in moving vehicles, according to a vet chick I dated, heh.