Dog Detectives - An article from the New York Times discusses how dogs are trained to identify substances and people. Viewing requires free registration. - http://www.nytimes.com/auth/login?URI=http://www.nytimes.com/2002/12/24/science/life/24DOG.html
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. - http://www.k9hero.com/
Working Dog Evaluation - A modification of the Puppy Aptitude Test used to predict temperament. - http://www.malinut.com/write/paws.shtml
Working Dog Training - Free articles cover motivation, problem-solving and imprinting. - http://www.jonnijoyce.com/articles/