Hi, I'm Country Mom9. We have raised a variety of chickens for over 26 years, but never had White Leghorns. This batch of hens are about one year old and are great egg layers . Last week two White Leghorn hens became lethargic and their combs began to disappear. This morning a third hen is showing the same signs and symptoms. We have separated them from the rest of the flock. We have never had this issue with other breeds we raised. Has anyone else had this issue with White Leghorns? Thanks so much.