Senior Master Sergeant Billy Hardin, pararescue superintendent for the Kentucky Air National Guard’s 123rd Special Tactics Squadron, listens to the heart of a dog during a training session at Jefferson Community College in Shelbyville, Ky., on Dec. 5, 2013. Hardin is one of 10 Kentucky Air Guard pararescuemen who learned to treat military working dogs during the two-day course. ( Air National Guard photo by Master Sgt. Phil Speck)

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Photo credit: © RP Photo / Alamy / Afripics
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