He hurt his lower back by slipped disk in his spine. It was a very scary event for a few weeks. Some dachshunds completely loose their rear leg abilities and must use a doggie wheel harness on the rear legs. For more info search "IVDD dachshunds" on RU-vid. Just after the accident, Scooter is very slow and wobbly. Near the end of this video his rear legs give out and he falls down.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-faYqeHiWZCw.html A week later he tries climbing the steps. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FUyahdpInBc.html He is fully recovered now, but far more careful of his back...