Black Lab Outperforms Lab Test at Detecting Cancer

With a little training, a dog can learn to heel. But a new study adds to growing evidence that man's best friend can also learn to heal by detecting invisible signs of disease. Marine, a specially-trained 8-year-old black Labrador retriever, detected colorectal cancer 91 percent of the time when sniffing patients' breath and 97 percent of the time when sniffing stool, according to a study published Jan. 31 in the British journal Gut. She even beat the fecal occult blood test, the most...Full Story