Harley, 17 weeks old, looks like any other playful black lab. But she's on the clock. Her job is to stay with Will to let him know - by smelling him - when his blood glucose level spikes too high or dips too low
“It is an odor that your body produces,” says dog trainer Cheri Campbell. “When you go high, it's sweet. Low is acetone smell.”
Training Labradors to be diabetic alert dogs is pretty new. They say it’s similar to training dogs to detect explosives.