Best and Worst Dogs for Security: Ranks breeds for guarding, protection, and watchdog barking.
Dog Detectives: An article from the New York Times discusses how dogs are trained to identify substances and people. Viewing requires free registration.
K9 Hero: Illustrated accounts acknowledge animals who have given more than expected of them, including those working with police, the military, search and rescue and as service dogs.
Working Dog Evaluation: A modification of the Puppy Aptitude Test used to predict temperament.
Working Dog Training: Free articles cover motivation, problem-solving and imprinting.