When dogs fulfill their roles they are ecstatically happy.

I began to encounter real-life stories of dogs protecting their wounded or dying or dead handler... or dogs refusing to leave the bodies of the people they were bonded to, sitting in cemeteries for days or sometimes weeks. You find these stories endlessly.

What they smell isn't the emotion of fear. What dogs can smell is the changes in a person's skin that suggest fear to the dog, anxiety, the way your skin sweats, the amount of uric acid that suddenly pours out of your pores.

At Lackland Air Force Base, they make an effort to retrain military dogs that suffer from PTSD. It's a lengthy, long process. The treatment is much the same as it would be for people, but it's a difficult road back.

First and foremost I am a commercial writer, and I hope to entertain people. But having said that, I'm in love with the relationship between humans and dogs, and the more I learned about what our military working dogs are doing, I wanted to at least share with people what an important role these animals have in all our lives.