I found this fascinating quote today:
September 05, 2009 KANSAS CITY, Mo., Sep 5, 2009 (UPI via COMTEX) — Two U.S. researchers say dogs appear to be helpful to soldiers and former soldiers suffering from post-traumatic stress disorder. (source: Psycport.com) – RSS and News widget on Feedzilla.com Share and Enjoy: thesweetmagnolia.com, thesweetmagnolia.com-anxiety, Sep 2009
You should read the whole article.