Aura shifting (AS): occurs when the shape or form of an auric field or life energy field changes to that of the theriotype. This is a spiritual related shift in that it requires the belief in auras which are considered paranormal.
A Therian may also experience a partial or full mental shift along with an aura shift.
Discussions on AHWW were clearly including this type of shift as early as 1996, but this is a less common shift that we don't see mentioned very often in the community today.
References
Shifting Types, Therian Wiki - http://therian.wikia.com/wiki/Therianthropic_Shifting_types
Were.net, "Shifting and Awareness Terms" January 18, 2001 (archived page accessed May 25, 2018) https://web.archive.org/web/20010118174900/http://www.were.net:80/~pinky/wereterms.html
Shifters.org Encyclopedia (2006 web archive) - http://web.archive.org/web/20060517083239/http://www.therianthropy.org:80/SO/shifting-a.htm
"Proposal: Werecode v.0.5", September 29, 1996, (accessed May 25, 2018) https://groups.google.com/d/msg/alt.horror.werewolves/1cYEm0yfZZM/m6W8ZaoNKzMJ
Auras
https://en.wikipedia.org/wiki/Aura_(paranormal)
The Skeptics Dictionary - http://skepdic.com/auras.html
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The Types of Therian Shifts
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