The passageway through the central corridor at Cincinnati Children's is a hallway where, on any given day, someone is bound to be having a bad day. Tired-looking parents struggle with the stresses of having sick children. Families navigate with wheelchairs and strollers past doctors, nurses and staffers who head to appointments and hospital rooms. But something special happens when Abby enters the building. The mood lightens. People stop and smile. Conversations begin. Abby Golden Doodle, a therapy dog, looks like she's smiling back at everyone who smiles at her. In this "Tell Me a Story," Greg Park talks about his dog Abby.