A three-year-old, spayed female Doberman Pinscher was presented to the Cornell University Hospital for Animals' Emergency Service for evalµation of acute abdominal pain and severe hematochezia. An abdominal ultrasound was performed, which was diagnostic for an intussusception. When anesthetized for a surgical resection and anastomosis, the patient experienced severe hypotension, which was nonresponsive to pharmacologic intervention. Due to increased suspicion ofhypoadrenocorticism, an ACTH stimulation test was performed. After placement of a nasogastric tube, the patient developed a pneumothorax and suffered cardiopulmonary an·est. Cardiopulmonary resuscitation was performed and return of spontaneous circulation was achieved, however the patient remained comatose for three days. Upon regaining responsiveness, she exhibited multifocal neurologic deficits. ACTH stimulation test results, evaluated in conjunction with electrolyte values from presentation, were consistent with atypical hypoadrenocorticism. The patient was treated with glucocorticoids as well as intensive physical therapy and rapidly improved to make a full recovery.