When veterans train "their own service dog, there are immediate benefits right off the bat," Cortani said. "They have a mission and a purpose again. It gives them something to focus on and to complete. It gives them a sense of security and safety. ... They know they're not alone. They've always got their buddy at the end of the leash."
Now Wilson tells Lobo, "Watch my back," and his four-legged friend stands behind him and gives him a nudge if anyone approaches. When something stokes Wilson's anxiety, Lobo senses it, jumps up and puts his paws on Wilson's chest so he can redirect his focus.
War vets find solace in four-legged friends - CNN.com