This is Hột vịt lộn and it is a duck fetus. You probably have seen it on tv shows like Bizarre Foods with Andrew Zimmerman, Anthony Bourdain: No Reservations and Fear Factor. I don't know what the BFD is all about other than the fact that it's delicious.
I made a little nest for my duck fetus because it was too hot to hold. Thao, on the other hand, is champ and is eating it the way a true Viet would and should. Maybe she got a complex from having a hot vit lon explode in her face some years ago.
It took weeks to remove the beak that was lodged in her fo'head.