In about 8 days, I have had two hens dying unexpectedly. They both were 3 and 1/2 years old and showed no symptoms of anything. Both were acting sleepy in the morning and were dead within about three hours. They both looked beautiful. No sign of parasites, tumor, buildup of fluid in the abdominal cavity. They looked perfect! If I really looked, it could have been said that they were experiencing a little heavy breathing. But, there was no discharge, no swollen face , no symptoms of any respiratory infection that I know of. Has anybody experience this? This is so scary.