Updated below... Now, two of our bantams have died in first two days outside. (Original post) Heartbroken.. last night was our 5 chicks' first night outside. This evening I came home to find our polish bantam dead in the run. The other 4 (3 BOs & 1 bantam brahma) all seem fine. It was just so strange... She was fine yesterday playing outside all day, and then last night we picked her and the others up and put in the coop. This was their first time being locked in there. What the heck could have happened? I saw no signs of trauma. It was in the 60s overnight. She obviously came out of the coop on her own... Was quite a ways away from the coop.