Board Thread:Naruto Discussions/@comment-26431570-20190526171926/@comment-32685487-20190530145136

KinGin bros got whiskers after eating 9 Tails flesh, Kushina was a preg Jin, and her baby came out with Whiskers, the whiskers are now part of the genetics, though as we see with successive generations the kids will get 1 less whisker. So Boruto and Himawari's children should have either 1 whisker or none at all.