American Miniature horses are essentially a full-size horse that has been miniaturised. The American Miniature has lengthy and angled shoulders; a long and flexible neck; well-formed forearms; wide-set and large eyes; flaring nostrils; and medium-sized, pointed ears that seem to be perpetually standing at attention.

The psychosocial effects of equine-assisted therapy come from the horse's ability to recognise human emotions and provide an intentional response. These effects can improve self-esteem, self-presence, independence, and feelings of freedom.