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.