A 5-year-old intact male Cocker Spaniel is presented with severe lower back pain. The dog is ambulatory but too fractious to examine reflexes or conscious proprioception. The dog is sedated and carefully lateral radiographs are made of the lumbar spine. The radiograph is shown below. What is your diagnosis?
一个5岁的未绝育雄性可卡猎犬表现出严重的下背部疼痛。该犬可以步行,但过于烦躁,无法检查反射或自觉本体感觉。狗进行镇静后小心地拍摄了腰椎的侧位片。如下所示。你的诊断是什么?