When my dogs sniff at a tree or dirt patch with special enthusiasm, I wonder what kind of information they’re getting. Their amazing noses allow them to “see” a world that’s practically foreign to us humans.
Over the years, smart people have found ways to harness that nose power to help detect drugs, cancer and illegal DVDs . Now they’re training Cocker Spaniels to sniff out cash-carrying criminals  and Poodles to detect peanuts to help kids  with life-threatening allergic reactions.
When you take your dog for a walk, is it more like going for a sniff? Does s/he put her nose to the ground or prefer air scenting? What's the strangest thing your dog's nose has discovered?