Board Thread:Naruto Discussions/@comment-24577388-20150224012723/@comment-26422475-20180318043042

ScottKazama wrote: Unless if Boruto, along w/ Himawari somehow got their own tail-beast by birth, the off-springs of Kurama. I expect Hima’s ended up being different species: a Rabbit instead of a Fox, & its predictably a female I don't think biju work like that.

The biju only exist because Hagoromo crafted them from another living creature, so unless they craft chakra themselves (or maybe Naruto does it for them), I don't think they just get biju of their own.