I have six backyard hens and live near nashville tn. 5 had finished molting but the 6th started late. Yesterday i noticed she was slow and this morning she was barely standing. It recently got below freezing at night so i thought i would bring her in this morning and she would be better tonight. She haunches down most of the time and walks low to ground. But she can stand up and she even jumped while i was observing her, probably wanting out of the large dog kennel i have her in. She spilled her food and water all over of course, but she did eat some while i was watching. I put a different watering unit in but havent seen her drink. I am not sure if a. She got cold per her under belly just has the feather shoots, b. She ate moldy food. C. Something else?. I noticed a little blood in the kennel. Any suggestions? The rest of the hens are fine...well i have an egg eater and a few bossy girls but thats less important.