What Happens When Kids Stop Breathing Through Their Noses and Start Breathing Through Their Mouths?

Many in the orthodontic profession believe that facial development and structure are determined by genetic factors. In this video Dr. Hang presents a young man who began breathing through his mouth (instead of his nose) after he got a pet gerbil which stayed in his bedroom. As a result of the change in how the boy was breathing, his facial development changed radically.