NAVLE（北美执业兽医考题）Day 556

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出现跛行和体重不增长的表现。 他和其他猎犬一起住在室外的狗窝里，平时吃的是大型犬的幼犬粮。 他分别在8、12和16周龄时打了疫苗。 狗狗很安静，警觉，反应灵敏，身体状况评分是3/9，肋骨凸显和脂肪沉积不良，他的粘膜呈淡粉红色，毛细血管再充盈时间为2秒。 心脏和肺部听诊正常，腹部触诊没有异常。 他是还没有去势，两个睾丸都在阴囊里。 唯一的异常是他会经常咀嚼的两只前脚和左后脚的爪垫（见图）。 我们应该进行哪项测试？