Poussin is jargon for a young chicken. The poussin is also known as the bantam or the chick. Poussin is a beautiful young chicken. The size of a poussin is interesting; you can serve a whole poussin as a single-serving dish. It is tender as butter and mild in flavor; a true delicacy. Lightly brine it before you prepare it, so its tenderness is preserved. It can easily be prepared on the grill or in the oven.