Three weeks ago, we lost a 1 1/2 yr. old hen. My husband noticed one evening she looked a little sickly, but it was dark and she had already settled into the coop for the night so weren't sure. He said she looked like a hen would look if it had the flu. She died the next day before I could do anything to help her. Then a week later, I found another one of our 1 1/2 yr. old hens hunkered down in the grass and could tell something was wrong. I moved her into a separate area, put a light on her, and gave her some food and water. She drank a ton, but wouldn't eat very much (gave her feed, yogurt, and some seeds we use as treats). She was also super skinny, although she was already one of my smaller chickens. Once I separated her, she would only stand up...wouldn't lay down. She had green, runny poo, which made sense since she wasn't eating anything. She stayed like this for two days. I gave her a bath thinking she might be egg bound, but couldn't feel anything. I wrapped her loosely in a towel so that I could get her to rest (since she was still standing) and she died about 2 hours later. No blood in her poo, no other symptoms other than not moving much and not eating. I also checked for sour crop, but could tell it wasn't that. I'm in the Dallas area and we got hit hard last night with over an inch of sleet and it's in the 20's today. Most of my chickens (I have 31) have remained in the coops...I've been bringing them fresh water and food. I noticed one of my 2 1/2 yr. old hens laying in the bottom of one of the coops looking very tired. At first, I thought she was just not happy to be in the coop all day (I've had the doors open, they just aren't wandering out). I went out just a little bit ago and she literally fell out of the coop door, stood up very slowly, and painstakingly walked a small distance before I got over to her and tried to offer her some water. She wouldn't drink. So now I've separated her and gave her water and yogurt (which she isn't eating or drinking). I'm beyond frustrated because I can't figure out what the problem is. I've looked up all sorts of information trying to pinpoint what could be happening. Am I overlooking something obvious? Please help!!