A Great Dane assists a 13-year-old girl living with a limiting condition; a Border Collie helps the California Task Force search for survivors; Ruger sniffs out illegal poachers in Zambia.

Border Collies at a South African airport work to prevent bird/aircraft collisions; a Sprocker Spaniel and Anatolian Shepherd save lives in the British countryside.

A German shepherd mix and an L.A. firefighter search for mudslide survivors; spaniels search for underground water leaks; a Labrador learns to read.

A blind woman gets a running mate; a Jack Russell cares for species; a pack of dogs protects rhinos in Kenya; a Border Collie protects visitors in Glacier National Park.

Dogs are using their remarkable scenting skills for lifesaving conservation and pro-active environmental policing; in Canada, a team of canine detectives is sniffing out the destructive invasive zebra mussel.