Depends on how small she is. If she's tiny, and they are really big, I don't see a way. But if they're around a medium height, and she's not that small, then it's likely
Yes, they can. That doesn't mean yours will, but technically they can go broody. I am a little concerned with hatching eggs from a serama pullet this young, but I in no way shape or form have enough hatching experience to be talking, so I'll tag some people. @bantamsrmyfav @WoDia @JacinLarkwell