When I went out to the coop this morning to let the chickens out I found one of my hens on the roost with her head all tucked in. She was fast asleep even with all of the commotion going on. So I picked her up and she did not struggle or make a sound. She woke up some and bokked at me but then went right back to sleep. So I put her down on the ground to see if she would stand up and she just fell over. :-( I noticed that her head smells really bad. So, what could possibly be going on? I have her isolated in a large dog crate with food and water but I am stumped as to what could be the problem. I did notice that she sounds a bit congested when she breathes but there is no nasal discharge, eye swelling or any other respiratory symptom. Her crop feels fine and her vent looks normal. When I put her down in her cage her feet were curled and she could not straighten her toes so I had to do it for her so she could stand up. I do not have a good feeling about this at all. :-( Any ideas what's going on? She was totally fine last night when she went in.