Tracking a Subtle Scent, a Dog May Help Save the Whales

Tucker, a black lab mix, is said to be the world’s only working dog able to track the scent of orca feces, which give clues to the whales’ health, in open ocean water.

http://www.nytimes.com/2012/09/02/us...me-whales.html

("Salty dog" video very interesting)