I found my less than 6 month old Rhode Island dead in the coop this morning. She was under the roost all stretched out with rigor mortis. I have no idea what happened to her. She was very healthy, happy and active. She was my favorite bird and I'm just heartbroken. I only had 6 chickens and the rest of them seem depressed today too. I've read about sudden death, heart attacks, etc....She had no indication of illness, mites, lice, egg bound, etc..She'd only laid a couple of times. Super sad day for me.