Please help me figure out what happened. This morning I went into the coop to let my flock out and found my 17 week old Cuckoo Maran dead on her back with her legs up in the air on the floor of the coop. She was close to the door of the coop, so she must have gotten down from the roost on her own. In another words, she didn't die and fall down from the roost. After freaking out for 5 to 10 minutes, went back in and her legs had dropped down. Does this mean she had just died when I first saw her? Her eyes were closed. No signs of injury or blood. All the other chickens are just fine too. I tucked all the chickens in last night. They were all fine and healthy, and up on the roost for the night. What do you think could have happened? Maybe a heart attack? They are all on a good quality feed, they free range hours every day, and are given fresh veggies and fruit. I'm so sad. Thanks everyone for your help.