Hello, I have a flock of nine chickens and today one of them died She is a Golden Comet about four years old. This past week she was looking very sluggish and sniffling. She was also very skinny even though she was eating and drinking a lot. Her feathers looked ruffled and she kept to herself. She also kept her eyes closed a lot. Just before she died she started stretching out her neck and gasping for air. She started violently tossing herself across the ground and then died. Her poop was green, but her vent was clean. The rest of my flock appears to be their normal selves but I am worried they will get whatever she had. Does anyone know what disease my chicken had? I Am finding it hard to narrow it down. I appreciate any ideas!