Advocates and professionals have recognized the benefits of assistive animals for people with physical disabilities, including seeing eye dogs or hearing dogs who are trained to perform simple tasks such as carrying notes and alerting their owners to oncoming traffic or other environmental hazards. Recent research suggests that people with psychiatric disabilities can benefit significantly from assistive animals as well. Emotional support animals have been proven extremely effective at ameliorating the symptoms of these disabilities, such as depression and post-traumatic stress disorder, by providing therapeutic nurture and support.

Because emotional support and service animals are not "pets," but rather are considered to be more like assistive aids such as wheelchairs, the law will generally require the landlord to make an exception to a "no pet" policy so that a tenant with a disability can fully use and enjoy his or her dwelling. In most housing complexes, so long as the tenant has a letter or prescription from an appropriate professional, such as a therapist or physician, and meets the definition of a person with a disability, he or she is entitled to a reasonable accommodation that would allow an emotional support animal in the apartment.

Some people may also be permitted to bring pets into a restaurant.....