The service animal must be harnessed, leashed, or tethered while in public places unless these devices intervene with the service animal's work or the person's incapacity prevents use of those gadgets. In that case, the person should use voice, signal, or different efficient means to maintain control of the animal. For example, a person who makes use of a wheelchair may use an extended, retractable leash to permit her service animal to select up or retrieve items. She could not allow the canine to wander away from her and must preserve control of the canine, even if it is retrieving…