article on NPR's site explores the uncanny ability of dogs to sniff-out cancer. According to the study cited in the article, "Japanese researchers report that an eight-year-old black Labrador was 97 percent accurate in nosing out colon cancer..." -- a higher degree of accuracy than any standard test for the disease. Wow! That glorious canine nose reportedly can discriminate at the parts-per-trillion level.
This gives me further pause when I think about going for walks in areas with lots of auto traffic...all that exhaust from cars is right at dog nose level. That even chokes me. It also gives one pause to think about what cedar bedding, strong-smelling perfume and household cleaning products do to the poor dog's sensitive nose. The other day I could hardly taste my meal at a restaurant because the person next to me was wearing so much perfume. I sincerely hope she didn't have dogs at home.