Board Thread:Theories and Speculation/@comment-26889573-20151008053113/@comment-1872728-20151013113618

Thekillman wrote: they already were frogs "There are many statues of the frog ancestors and of people who tried to learn senjutsu, but failed and became toad statues." (http://naruto.wikia.com/wiki/Mount_My%C5%8Dboku)