CASE HISTORY AND CLINICAL FINDINGS
A 3-month-old Thoroughbred filly was referred to the Davidson Surgery Center at the Hagyard Equine Medical Institute in Lexington, Kentucky for a history of left forelimb lameness of three days duration. The lameness was first noted by the owner when the filly was brought in from turnout with other mares and foals. There was no evidence of visible trauma and the filly had been reportedly healthy. At the time of admission, the foal appeared bright, heart rate was 60 beats per minute, respiratory rate was 24 breaths per minute, and temperature was 38.0 ºC. There was no evidence of joint sepsis or other co-morbidities on physical examination. The foal was mildly resistant to palpation of the proximal forelimb. Passive range of motion of the proximal forelimb appeared normal. No crepitus, asymmetry, or muscle atrophy of the region was appreciated. The foal’s lameness was described as a 4/5 left forelimb lameness (AAEP grading scale, AAEP, 2018) with a reduction of the cranial phase of the stride at a walk.