NAVLE（北美执业兽医考题）Day 555

Q1:A 9-year old male Queensland Heeler presents with a four day history of progressive tetraparesis. Physical exam showed him to be weakly ambulatory with support. As part of your initial workup, you take chest X-rays which are shown below. Which of the following next steps is the most appropriate test to confirm your clinical suspicion about the cause of the dogs signs?一只9岁的雄性澳洲牧牛犬由于4天前开始出现并且越发严重的四肢轻瘫前来就诊。体格检查时他可以在帮助下慢慢走动。初步检查时拍摄的胸腔x光片如下图。以下哪个选项是最适合的进一步检查来证实你的怀疑？[图片]