As a trained service animal, Strong has a job to do — helping his master to get around. For her part, Judy Beck must see that Strong continually leads her as he’s been trained. Beck grasps the stiff handle attached to the harness around Strong’s chest. She interprets the handle’s motions as signals of what she and Strong are approaching — a turn, a curb cut or someone else out for a stroll. Because Beck has lost most of her vision, Strong is one of the tools she uses to be as active and independent as she can be. s she can be.