Talk:Afflictions and illnesses/@comment-27754788-20140108024813/@comment-5837525-20140313154521

The article isn't limited to "natural causes". The Mane 6's cutie marks getting swapped doesn't count as an affliction because the show doesn't treat it as an affliction -- the affected characters view their new lives as normal.

You could argue it's a form of memory alteration, but I think it'd be best reserved for the forums.