What would cause a chick to suddenly die with its eyes still wide open? I left the house for a couple of hours earlier, and came home to find my slightly over a week old Serama chick dead. It was stiff as a board, so I'm guessing it had to have died not long after I left. When I left, it was running around happy as can be. I'm guessing that it was probably sudden death syndrome, but a few people are telling me cocci (which I'm doubting).