Is the deerpocalypse still going on? Did it start with a dream (or fleeting vision of) a white stag?
Not for me personally. I’ve had a relationship with Deer since 2006 or so, with sporadic long-term contacts since around 2003. I originally stayed out of the phenomenon as I didn’t want to project my own experience on others, but it became clear a few months ago that the themes others were experiencing were approaching similar levels, which is when I began participating on Tumblr.
Others may have begun with white stags. It is a very traditional image in folklore - https://en.wikipedia.org/wiki/White_Hart
runecestershire will no doubt be able to tell you more on the King Richard linkages.