This section provides a web based overview of various normal dogs from a variety of dog breeds. Almost all 71 dog breeds currently represented have at least 3 representative dogs of the same breed. You can click on the individual images to zoom in from the case number home page. There will be extra thoracic abnormalities; however, the cases were deemed to be normal inside the thorax. In some older dogs, intrathoracic geriatric changes (unstructured interstitial pattern or airway mineralization).