When we went to put the chicken away night before last one of my hens(Oreo) did not look so well. She had the "penguin" stance and there was a pile of pooh/pee on the ground where here rear end was and also in one of the nesting boxes in the coup. We had to physically pick her up and carry her to the coop. Very unusual because none of our chicken with let you pick them up so easily. The next morning my husband opened the coop as usual and she walked out. Now my husband isn't very observant sometimes so needless to say he didn't notice if she still appeared sick or had any trouble walking or not. When I called him later yesterday morning to see how she was doing he couldn't find her. The kids and I looked and looked when we got home, I even waiting much longer before closing up the coop last night but she is now nowhere to be found? We have an extra coup which is always open that she could have gone in had she come home after we closed up last night, but it was still empty this morning. No trace of poor little Oreo anywhere??