I noticed yesterday that my EE Annie had some poop on her tail feathers. She seemed fine and so I didn't do anything for her. Well this morning when I went out to let my chickens out and Annie came out and was kinda sluggish. Well I picked her up and put her inside of a large dog kennel pen and gave her some vitamins, food and kept checking on her, I could tell she was dying and there was nothng I could do to save her. She was gasping with her mouth open and had some sticky stuff in her mouth. I guess it was mucus. Well she was dead this afternoon and we buried her. Does anyone know of what it may have been? She was eating up until today and she was a good weight, no worms and I saw no visible signs of injury, no open sores or anything?