Yesterday we lost an older hen about 4 years old. We figured she died of the cold, or of old age. Before she died she walked around all fluffed up, her comb was pale, and she seemed to be getting weaker, by way of not perching with the other birds and sleeping on the floor. The day she died she was curled up in a corner of the coop, When I picked her up she was still alive, she moved a little, but her head was in her feathers, but it didn't seem like she could move her neck and her eyes were closed. She passed away in a few hours. This morning we lost a little banty roo, he was also curled up on the floor. Didn't see many symptoms, or reasons why he died. We assume it was the cold that got him, as our coop is pretty drafty, But I want to make sure there isn't a sickness going around, before we lose any more! Could it be Cocci? Can it happen in a cold winter?