Dogs Can Smell Cancer - Secret Life of Dogs - BBC

Published on Jan 26, 2014 BBC Earth ·856 videos

"Dogs watch us all the time and read our body language like a sixth sense. They also smell our bodies for changes. Max smelt cancer in Maureen before any medical scans could pick it up. Dogs do this naturally and can be trained to pick up on tiny volatile chemicals given off by cancerous tumors. They can even be taught to alert diabetics to low blood sugar levels."