Board Thread:False Info and Speculative Discussion/@comment-24732895-20160411234226/@comment-26879545-20160414215102

Sean 175 wrote: The dread doctors meddling. 😎 There's no canonical evidence to say, for a fact, that the DD's are the reason that the fox spirit went rogue. For all we know, Kira and the fox were already in the process of "fighting" for control of the body. Whatever the DD's did could have sped up the process, but we just don't know.

So, as LadyX stated, "there is no canonical answer to that question."