Board Thread:Speculation House/@comment-24464090-20140620192722/@comment-3146930-20140620221909

I also agree with what was posted above. The Faunus are treated as a different species of human. It is sort of like how in our world there are Asians, Mexicans, Germans, and so on. Two German people wouldn't end up with an Irish child just out of the blue like that and I think the same could be said for the Faunus and humans of the RWBY world. If two humans have a child, it is going to be a human and if two Faunus have a child, it will be a Faunus.

However because of all the animal traits the Faunus have, two different types of Faunus could have a child with various traits. For example, if a Dog and Cat Faunus had a child, it could have only dog traits, it could have only cat traits, or it may have a mix of both (think dog ears/tail and cat eyes as an example). However there isn't much we know about the mating habits of Faunus.

As far as a human/Faunus child, I see it as having less noticeable animal traits. So the child may have night vision like most Faunus, but could lack the ears and tail. Maybe it could only have a tail or only have the ears. Either way, if this child grew up and had a child with another human, then I see the Faunus gene eventually getting pushed aside after enough generations pass, as at a certain point the offspring would be mostly human.