Albeit news from a few years ago, Tucker is still our celebrity.    Tucker the black labrador who has been helping conserve Orcas in California. Acting as a’pooper snooper’ he sits on the prow of a boat used by researchers sniffing out killer whale poo. When it has been fished out of the water it is tested to check the health and diet of the fearsome predators. His reward? A chance to play with his favourite ball!  http://www.nytimes.com/2012/09/02/us/sniffing-out-a-subtle-scent-to-help-save-some-whales.html