Inclusion Criteria:  Older than 40 years With autism spectrum disorder Able to walk autonomously, without help from other people. Able to climb and descent stairs autonomously, without help from other people.  Exclusion Criteria:  Medical condition that contraindicates the proximity or contact with the animals with the animals on the part of the user. Allergy to dog epithelium. Phobias to dogs. History of aggression to animals. Users who do not submit a signed informed consent form.