There are anecdotal reports of individuals reporting benefits from owning parrots and other pet birds. In 1997, a study published in Anthrozoos: A Multidisciplinary Journal of The Interactions of People & Animals revealed that elderly men who were exposed to an aviary at the Veterans Administration Medical Center showed a reduction in depression. It is thought that birds may offer an opportunity for communication and social contact that lifts mood.
Dophin Assisted Therapy (DAT) is one of the most extensively researched areas of AAT and is commonly used among special-needs children. In 2005, researchers Christian Antonioli and Michael A. Reveley published findings from their research in the British Medical Journal reporting that mild and moderately depressed individuals showed improvement after swimming with dolphins for two weeks.