NAVLE（北美执业兽医考题）Day 793

A 6-month old Chocolate Labrador presents for limping and failure to gain weight. He is housed in an outdoor kennel with other hunting dogs. He is fed a large breed dry puppy food. He received his puppy shots at 8, 12, and 16 weeks old. He is quiet, alert, and responsive. His body condition score is 3/9, with rib exposure and poor fat deposition. His mucous membranes are pale pink, with a capillary refill time of 2 seconds. His heart and lungs auscult normally. No abnormalities are felt on abdominal palpation. He is an intact male, and both testicles are descended. The only abnormalities are the pads of his two front feet and left hind foot (see image) that he chews at frequently. What is diagnostic test of choice?
一只6个月大的巧克力色拉布拉多犬由于跛行和体重不涨前来就诊。他和另外一些猎犬住在一起，平时吃的是大型犬幼犬粮。在他8，12，16周龄的时候注射了疫苗。这只狗安静，警觉，反应正常。他的体况评分为3/9，肋骨突出，皮下脂肪不足。他的粘膜颜色粉白，CRT为2s。心肺听诊正常。腹部触诊无明显异常。他还没有做绝育，双侧睾丸正常。唯一异常的地方在他的双前肢和左后肢的脚垫如下图，他经常会啃咬。你会选择的诊断测试是什么？