Tucker is a dog who helps save Orca whales. He sniffles their 'poo' and the marine biologists who work with Tucker can track the Orca's movements and learn all kinds of stuff about them.
Because of all the overfishing, it is getting harder for Orca whales to find enough fish to eat. They like to eat salmon. Orcas are stressed in looking for food. I guess that there are ways this can be found out by the stuff in their droppings. It can tell what they are eating and a lot more. Tucker doesn't like to get wet even though he spends lots of time on boats off the coast of Seattle.
Here's a cool click link to the article and video about Tucker. What a dog!
"We never know the worth of water till the well is dry." ~Thomas Fuller, Gnomologia, 1732