Hi, I posted a few days ago. I had to have one of my four hens put down as she had suddenly become ill, completely lethargic, not eating. Yesterday got a pullet, keeping her in a cage in the coop with the other chickens, to replace the lost one. Now another hen is getting sick. Same thing, major lethargy, not eating, etc.. head is down, not moving. I am SO SO SO UPSET. What is going on??????? All my hens have been very healthy and just finished their first laying season. I don't know if they are eating something in the yard that is killing them or what. Virus??? But where would they get it? And now I've had this pullet in the same coop as the chickens, although in a cage. I'm about to move her out to another location, though if this is viral, I'm sure she has already been exposed. I'm beyond upset. What could be killing my chickens?