Old Rottweilers hind legs are stiff and practically useless. She frequently falls when walking short distances. January Is National Train Your Dog Month In 2021 Dog Training Become A Dog Trainer Easiest Dogs To Train Although the changes are normal care for and treat your dog early to prevent unnecessary pain and avoid further deterioration. Dog back legs collapsing . When accompanied by shaking or a dogs hind legs collapsing its generally an indication of a neuromuscular problem. Small dogs typically live longer and large dogs tend to display deterioration in their legs earlier. The majority of a dogs old-age symptoms which. Stanley our labrador was messing about in the park with some rough friends the other day when suddenly his back legs collapsed. Sometimes collapses when urinating or defecating. A canine with diabetes may also present back leg collapse symptoms. Symptoms can include muscle weakness cramps stiffness and spasm and is typically caused by one of ...