Onager a subspecies of the onager as "E. hemionus kiang", but recent molecular studies indicate it to be a distinct species, having diverged from the closest relative of the Mongolian wild ass's ancestor less than 500,000 years ago. Widely five recognized subspecies of the onager include: A sixth possible subspecies, the Gobi khulan ("E. h. luteus", also called the "chigetai" or "dziggetai") has been proposed, but may be synonymous with "E. h. hemionus". Debates over the taxonomic identity of the onager occurred until 1980. As of today, four living subspecies and one extinct subspecies of the Asiatic wild ass have been
Emotional support animal support animals to one animal per ticketed passenger. The main controversies are the behavior of some animals, harms to other people, the problem of widespread fraud, and the open scientific question about whether emotional support animals provide significant benefit. An emotional support animal may cause problems that a trained assistance dog may not. For instance, due to the lack of training, an emotional support animal may bark at and smell other people, whereas service dogs are trained not to do so. People with a different type of invisible disability – allergy to animal dander – have suffered from allergic attacks