A 12-year-old, male castrated Samoyed dog presented to the Cornell University’s Hospital for Animals for treatment of pneumothorax diagnosed by his primary care veterinarian on 8/14/14. Clinical signs of coughing, tachypnea and pacing began six days prior. On presentation to the Emergency Service, the patient was tachycardic, tachypneic, and dyspneic. Initial stabilization included intravenous catheter placement, thoracic-focused assessment with sonography for trauma (TFAST), and thoracocentesis. Bilateral thoracostomy tubes were placed for continuous suction. Computed tomography (CT) scan of the thorax was non-diagnostic. A median sternotomy was performed and revealed two, small bullae in the right cranial lung lobe. One bulla was visualized to be leaking air. Abnormal tissue was removed and submitted for histopathology. Complications encountered after surgery included poor oxygenation status and hypoproteinemia. The patient was discharged four days post-operatively. As of December 2014, the patient had not experienced recurrence of pneumothorax.