Does anyone know anything about Sudden Death Syndrome? I've had 2 apparently healthy and vigorous layers die with no symptoms or warning in 24 hours, out of 7 hens. They are about 3 years old. They weren't huddled in a corner or anything, like sick chickens. The only abnormality I saw after death was what looks like cloacal tissue protruding from their vents. This apparently is a symptom of Sudden Death Syndrome but can that affect 2 of 7 hens within 24 hours? Is it maybe something else? No one else seems sick either. It has been unusually cold here (got down to minus 18 F the night before last, when one died. This happens only every few years). But last night, when the second died, it was very cold (minus 6 F) but not out of the ordinary for February. And she was still warm when I found her this morning, so it probably happened when it was warming up. It's probably unrelated but I am also treating one of the others for wry neck. I'm using the standard vitamins and anti-inflamatory treatment but it doesn't seem to be having much affect. Anyone have any suggestions or feedback?