FORT POLK, La. – Man’s best friend. Fido. Spot. Whatever you may call them, having a dog by your side is as American to some as apple pie. And while a rifle may be a Soldier’s best friend in most cases, for Sgt. Alfonzo Sanchez, his best friend is Cuki, a military working dog (MWD). Cuki and her handler Sanchez are active duty Soldiers sent to Louisiana to assist National Guardsmen participating in a rotation at the Joint Readiness Training Center here at Fort Polk.