A 4-month-old 5-kg (11-lb) sexually intact female mixed-breed dog was examined for a 5-day history of anorexia combined with weight-bearing lameness of the left forelimb and a 3-day history of fever (40.6°C [105.1°F]; reference range, 37.8° to 39.3°C [100.0° to 102.8°F]). According to the owner, the dog had no history of trauma. During physical examination, the dog was lethargic and normothermic (38.6°C [101.5°F]). Both distal antebrachial areas had mild soft tissue swelling that was warm to the touch and elicited signs of pain on palpation. Radiographs of the distal aspects of both antebrachia were obtained (Figure 1).