I posted a few weeks back about my older hen, Gladys, who was lethargic/sitting around/breathing heavily but still eating and drinking properly. She's progressed over the past few weeks, but still occasionally will "rest" in the hen house. Today I walked out to see what the other hens were doing gathered in the hen house to find that one of my younger (3yo) girls had just died moments before. The other hens were surrounding her. I quickly gathered her up so the others wouldn't peck at her body. She appeared to have thick mucus coming from her mouth - wondering if it was from respiratory congestion. Any thoughts? She showed no other signs of injury and was still limp and warm when I found her. I expected my oldest hen to die first. Having one of the younger girls die so suddenly is a shock. Should I do anything as a precautionary measure with my other hens? Any input is welcomed. Thanks so very much. I appreciate this community - you understand the bond that happens with our hens and their owners. My sweet girl will be missed.