I decided to read a few of the old chapters of naruto and i ran across something i never really paid attention to before
kakashi says byakugan is one of the bloodline limits passed down in the hyuuga clan. this leads me to beileve there are at least two or more. we know byakugan is one and i figure their chakra cointrol is another one seeing as the hyuuga are the only ones capable of Kaiten whch requires chakra from every point to be effective but what other blood line limits could there be. the hyuuga seem to be hiding a bit more than a blind spot in the byakugan.