My girls used to do this A LOT but I haven't seen them do it nearly as much any more. WIDE open beaks, and a head bob like movement, quick and then closed beak again no sound nothing. It looks like a yawn but one day I was laying on the floor watching the chicks through the window in the brooder when I saw Rose (our RIR) do this 10 - 15 times in a row. Hiccups? Gag reflex? there was no vomit and they all look very healthy. They are drinking fresh water, eating medicated chick starter, and grit for those yummy snacks of earth worms, cricket's, or meal worms (and the occasional veggie from the garden). What is this. Is it normal?