Thoracic surgery is a challenge for any veterinary surgeon. A review of several important articles on topics relative to thoracotomy procedures is presented. Discussion also includes an evaluation of availability of appropriate surgical facilities, necessary equipment before undertaking thoracic surgical procedures, and the essentials and pitfalls to making an approach and effectively closing the thoracic cavity of a dog or cat. This article reviews the 3 primary types of thoracotomy: lateral (intercostal) thoracotomy, median sternotomy, and transdiaphragmatic thoracotomy. Essential anatomy, surgical approach, and various techniques to ensure effective and durable thoracotomy closure are presented.