The Wall Street Journal's Mike Phillips reported that Gunner's handlers had no idea what it was the finally pushed him over the edge, the explosions around base or the gunfire on the range, but it wasn't long before Gunner was declared, "excess" by the Marine Corps.

Phillips wrote about Gunner originally from Afghanistan, and when he did, he got a tremendous outpouring of letters asking about the dog. One of those letters came from Phillips' close friend Deb Dunham, Marine Medal Of Honor Recipient Jason Dunham's mother, and the subject of a book by Phillips. Through their tandem effort, Gunner found a home with Dunham.

The nation's dogs of war often come home exhibiting the same symptoms of their human counterparts. Skittish, aggressive, antisocial, jumpy — there's a wide range of negative, psychological behaviors these dogs display due to possible trauma experienced on the battlefield.