Does anyone know of a good strong pen that I could buy for my German Shepherd, 100 Pounds. My dog just had surgery and we are bringing him on vacation in May to a beach house we are renting. Besides confining him to the top floor of this house, we want to confine him to a pen, so he is not running around the top floor. He will just be 6 weeks Post op by then, and I still want to keep him calm. The problem is my dog is an escape artist. He can break his way out of anything. He doesn't however jump things that much. I want to get a pen with no cover, and one that we can easily transport in our car, and also be somewhat strong and big. Thanks for you advice!