Correction: In “Evaluation of epidural administration of morphine or morphine and bupivacaine for postoperative analgesia after premedication with an opioid analgesic and orthopedic surgery in dogs” (J Am Vet Med Assoc 2006;229:1103–1112), the first sentence in the eighth complete paragraph on page 1104 should read, “Plasma cortisol concentration was determined as a nonspecific indicator of stress and pain and was assayed from samples collected before surgery to determine a baseline value.”