Board Thread:Naruto Discussions/@comment-27863200-20160302112610/@comment-734582-20160302173351

Tengen Toppa Ita-Sasuke wrote: What evidence exists whether they can or not? Scratch that, of course they can regenerate. Tailed beasts are made of chakra, so they should not be able to be damaged (unlike gyuki's horn for some reason). Yea i'm pretty sure Tailed Beasts can fully regenerate, they can resurrect after all.

As to Gyuki's horn, well the Raikage is the only one that bested him in 1-v-1 combat. I'm pretty sure he kept it cut off as a token of respect.