Scott Bailey Sidetracked A dog leads his man on some tracks, and when he pauses to piss on the grass   growing from the cracks of a cross-tie, he observes a diverging track   vanishing into a plume of wisteria that wraps the switchbox   and spirals along the rails where trains hitched cabooses,   lagging periods of run-ons. But for now, a dog's paws   are switchmen running the rails as it persuades this man   into veering:  a new path for nosing a leash away.