Board Thread:False Info and Speculative Discussion/@comment-121.217.63.151-20141006053221/@comment-4091815-20141015225929

Traditionally, a kitsune could shift - they were placed into the category for that reason alone.

However - their eyes change color so some physical transformation does take place making them fit the show's definition of shapeshifters. It also suggests that something beyond what we've seen so far is possible.