Study shows dogs can accurately sniff out cancer in blood Canine cancer detection could lead to new noninvasive, inexpensive ways to detect cancer EXPERIMENTAL BIOLOGY Orlando, Fla. (April 8, 2019) - Dogs have smell receptors 10,000 times more accurate than humans', making them highly sensitive to odors we can't perceive. A new study has shown that dogs can use their highly evolved sense of smell to pick out blood samples from people with cancer with almost 97 percent accurac