"On the other hand, service dogs belong to a specific owner that must meet the legal definition of disabled and perform at least three tasks in service to their owner to assist the disability. For people with PTSD, this might include awakening the owner from a nightmare, grounding the owner by physically putting pressure on the person’s feet or legs, or maneuvering themselves between the owner and other people. Service dogs ought to be trained to the specific owner. The dogs learn their owner and are then more effective service animals. Emotional support is not considered one of the three required tasks."