Not sure how this has so many positive reviews, however, it's one of the worst "orthopedic" dog beds I have ever purchased. My 100LB pitbull mastiff prefers her old bed - I placed both next to each other and after an hour or two of laying on this "orthopedic" bed, she moves to her old bed and stays there. I want to return it, I just have no idea how I am going to stuff this back into a box!