i know that to all i was asking was the fox's power cut in half and was notalright. the first tailed-beast was the 10-tails... it was brought under control by the Sage of Six Paths guy. He was the first ever jinchuurikin... When he was dying he realized that no one else could control the 10-tails (at that time)... So he (somehow) broke the beast into 9 different tailed beasts... the closer the number to 10 the more powerful and closer to the original tailed beast it is... this info is spread out through the manga somewhere (i'm sorry i can't remember the chapters)