Ok chicken friends I need your help. I lost one of my adopted chickens last night. We believe that she was an older hen. Last night upon going to lock up the ladies for the night I noticed her standing in a nesting box with her eyes closed. I walked over to pet her and noticed her wings hanging down. I picked her up and she just hung limp against my body. I set her down and she stood on her legs but had no balance.I checked her vent and she had a clear discharge with white coloring in it. Had my mother hold her under the heat lamp as it is freezing here in michigan. Her head began to get limp. I gave her water via eye dropper. She allowed this for 4 drops then began to regain some strength in her neck. Took her in the house and she just plummeted. She would no longer stand. Eyes closed and labored breathing. She passed away about an hour after discovery. Any ideas on what this could be.