A member of the army is walking with a German Shepard while the dog has something in has mouth.
A member of the army walks a German Shepard.
If a member of the army is walking a German Shepard, then a member of the army walks German Shepard
If the member is walking, the member walks.
Someone in the Army is walking with a German Shepherd with something in its mouth, so a member of the Army is walking the German Shepherd.