Blue-Collar Dogs - Season 1

A working dog's daily grind can take him to a wide variety of environments, from airport security to disaster relief, even to the frontlines of war. But more and more, scientists are shattering traditional notions of what dogs can do. Canine MD goes behind the scenes to discover how dogs are being put to work in incredible ways. Doctors, scientists and therapists are harnessing canine capabilities to change people's lives by training them to function as eyes for the blind, ears for the deaf, and legs for the disabled. With olfactory senses roughly 200,000 times more powerful than a human's, dogs are now being trained to detect diabetic blood sugar.

U.S. Customs and Border Protection K-9s are an integral part of securing our nation's borders. Using their extraordinary noses, these dogs detect smuggled narcotics, concealed humans, and can even locate victims stranded in the desert. At the Canine Center in El Paso, a class of green dogs is training to become America's newest crop of K-9 teams. Over the course of seven weeks, they'll run a gauntlet of drills designed to mold them into some of the most elite working dogs on the planet. Border Hounds offers an inside look at how these incredible animals are trained and deployed along one of the most dangerous stretches of border in the United States.

Follow some of the best NYC police dogs as they put their lives on the line sniffing out hidden bombs, fighting crime and defending the subways. In a city that's a prime target for international terrorism, the jobs of these working dogs - charged with safeguarding the Big Apple against crime and terrorism - are never done.