Lance Cpl. Jeremy D. Angenend, combat tracker handler, Military Police, III Marine Expeditionary Force, and his dog Fito play around at Camp Leatherneck, Afghanistan. Angenend and Fito have been partnered for two years. Angenend says that he and Fito have the same kind of goofy, outgoing personalities and they have fun together. "He never has a bad day," says Angenend, "I want no other dog." (USMC/Sgt. Megan Sindelar)




1st Sgt. Dean Bissey, left, Company C "Dustoff", 3rd General Support Aviation Battalion, hooks a hoist harness to Staff Sgt. Michael Hile and his military working dog "Ronnie" from 554th Military Police Company July 15 near Bagram Airfield, Afghanistan. (US Army/Spc. Aubree Rundle)




Ricky, an explosive detector dog, with Canadian soldiers from Task Force 3-09 Battle Group during operation Tazi, a village search and security operation in the Dand area of Kandahar Province, southern Afghanistan, on January 26, 2010. (AP Photo/Kirsty Wigglesworth)




US Marine of 3rd Battalion, 6th Marines, waits for the arrival of an anti-explosives squad team after a roadside bomb was discovered by his sniffer dog, during a 48-hour operation in Marjah, Helmand province, southern Afghanistan, on April 1, 2010. (Mauricio Lima/AFP/Getty Images)




US Marines from 1st Battalion, 8th Marines fire at alleged Taliban fighters as their dog runs around outside new Mirage base, on the south of Musa Qala District, Helmand province on February 4, 2011. (Dmitry Kostyukov/AFP/Getty Images)




US Marine anti-explosives team of 3rd Battalion, 6th Marines, blow up a roadside bomb in Marjah, Helmand province, on April 1, 2010. (Mauricio Lima/AFP/Getty Images)




Paris, a coalition force military working dog, drinks water in Farah province, Afghanistan, on November 26, 2012. (USMC/Sgt. Pete Thibodeau)




US Marine anti-explosives squad members check a crater after their anti-explosives squad team blew up a roadside bomb discovered by their sniffer dog in Marjah, Helmand province, on April 1, 2010. A single Afghan man was detained with a scratch map and a mobile number written on his hand nearby the site where the roadside bomb was found. (Mauricio Lima/AFP/Getty Images)




A dog belonging to a German soldier bites an Afghan during riots prior to a soccer match in Kabul's main stadium, on February 15, 2002. The match was to be a goodwill game between peacekeepers and an Afghan team when an overflow crowd began fighting their way through the gates, and Afghan police beat back the crowd with tree branches, strips of rubber, and the butts of their rifles, injuring at least 50 people, according to German peacekeeping medics. (AP Photo/Lefteris Pitarakis)




A U.S. Marine dog handler attends to his his Improvised Device Detection Dog, after he was injured and rescued by a helicopter of the U.S. Army Task Force Lift "Dust Off", Charlie Company 1-214 Aviation Regiment, on the outskirts of Sangin, in the Helmand Province on June 3, 2011. (AP Photo/Anja Niedringhaus)




Dog handler Sergeant Justin McGhee and his dog Archie, with the US Army's 67th Engineer Detachment, run for cover during a gun battle with suspected Taliban militants near the village of Jilga in Arghandab District north of Kandahar on July 8, 2010. (Reuters/Bob Strong)




US Army occupational therapist Sergeant Paul McCollough and Zeke, a therapy dog, at the Role 2 medical clinic in Kandahar military base, southern Afghanistan, on August 19, 2011. Zeke, a five year old labrador retriever who has a rank of Sergeant First Class, is trained to help soldiers struggling with stress and war trauma. Therapy dogs were first introduced in the war zone in Iraq in 2007 to replicate the psychological benefits the troops gain from US homeland care facilities employing specially trained dogs. (Romeo Gacad/AFP/Getty Images)




U.S. Army Specialist Joe Keck, who lost his left arm in a vehicle accident in Afghanistan in July 2006, and his new service dog Nolls sit on his bed at the residence at the National Education for Assistance Dog Service (NEADS) training facility in Princeton, Massachusetts, on June 25, 2007. (Reuters/Brian Snyder)




An Afghan deminer working with a dog on the outskirts of Kabul, on September 13, 2012. (Daud Yardost/AFP/Getty Images)




U.S. Army soldiers of 82nd Airborne Division and sniffer dog Alex sleep in a compound of Afghan security forces at night before a mission in Zahri district of Kandahar province, on May 30, 2012. (Reuters/Shamil Zhumatov)




A US Marine from 1st Battalion, 8th Marines plays with a trained dog at Shagali patrol base, in Musa Qala District, Helmand province on February 3, 2011. Each trained dog used for special purposes in the military can cost 70,000 USD or more. (Dmitry Kostyukov/AFP/Getty Images)




Czech Army dog handler, Staff Sgt. Joseph Reisinger, comforts Altos, an explosives protection dog, at Forward Operating Base Shank on September 30, 2012, in Logar province, Afghanistan. Altos was injured during combat operations earlier in the day. (US Army/Spc. Alexandra Campo)




U.S. Marine dog handler Sgt. Mark Behl, left, of the 3rd Marine Expeditionary Force K9 unit, and another Marine, perform first aid on U.S. Military working dog Drak, after he was wounded in a bomb attack in Sangin, Helmand province, on September 8, 2011. Drak's own handler, Sgt Kenneth A. Fischer, was also wounded in the bomb attack, which also killed several civilians. (AP Photo/Brennan Linsley)




Demining dogs work out at the Mine Detection and Dog Center (MDC) in Kabul on August 28, 2012. The center maintains around 200 dogs, some of them operational, some under training. (Massoud Hossaini/AFP/Getty Images)