Quote Originally Posted by Mysteltain View Post
Although, speaking of Au'ra, do we know when their horns and scales develop? Because if they begin to develop to some extent in the womb, then I would imagine that female Au'ra would have specifically evolved to be able to birth horned and scaled children without undue harm being caused to them during labor (beyond the pains of giving birth, to begin with). As such, I'd have a hard time believing that a female of any other race could bear a child with a male Au'ra without having severe complications.
Considering scales are actually just specialized skin cells, its likely they're there before birth; just softer and smaller until they get older.

The horns are probably acquired like many other animals that have them; they start out as small, hard "bumps" on the skull and grow as they mature. I'm 99% sure there as a dev post about the horns being able to heal/regrow if damaged, so they could also just be another type of scale that grows over time (which would start out small and soft and harden over time)

Other big problem with anything X Au Ra/Mi'qote is their tails...this probably prevents crossbreeding in-and-of-itself...