I am so sad. One of my chickens died yesterday(about 3 years old - Buff orfington) . The rest of the flock is fine. Saturday night I noticed she was lethargic. Sunday the same and at night I say she was throwing up (I know they don't actually vomit). Brought her in the house, warmed her up and she continued to decline and kept vomiting. She died before I could get her to the vet. I don't know what I could have done to prevent or help her. The flock has a big area to graze and they go into the coop at night. They get plenty of good food, scraps (only raw veggies), water and grit. I wish I would have brought her the house Sunday morning.