Hoping for some ideas as to what this is? Nothing in her crop and her underside feels fine to me. Clean everywhere. Not bleeding or flinching when I press all over as if she had an injury. I noticed earlier in the day that she was trying balance and her tail was bobbing up and down. But then she was back to eating and I was on the phone. I feel guilty now! Gawd! By the time it was dark the rest of the chickens were on our deck screaming at us telling us something was wrong. She was barely standing up, neck bent at the shoulders and floppy and when I picked her up she just went completely limp. This came on within 24 hours or I did not notice something was wrong . She had her mouth open like it was hard to breathe. We had a chicken a month ago take three days to die while we were trying to save her and I still don't know what happened to her. I thought egg bound but now I wonder if we've got something's going on? We killed the poor girl immediately last night because we didn't want our other four girls getting sick too. Mareks? Botulism? Any ideas???