Alrighty, my mastiff loves riding with me and my wife wherever we go. I put her bed in the back on the fold flat floors, but she always manages to push it out of the way somehow. When she is on the bare carpeted fold flat floor she slides around like she is on ice and I hate it. Has anyone come up with a solution for this or what you do in the back area? She is around 140lbs so she isnt tiny, I try to make it as comfertable as possible for her. Thanks!