My 5 year old hen seems to go through a hard molt every year. This year she is seeming very weak. Feathers puffed up standing on the floor of the coop by herself with her eyes closed. She does perk up for a minute when I go out there and she did peck at food a little so I think she's eating. Could this be normal molting behavior? I've been feeding her extra protein and ground eggshells. Last night she didn't climb up to roost. Last year she got pretty weak and the others started pecking at her and she had sores on her back. I brought her in and separated her for the rest of the winter and she got strong and beautiful again and integrated well back into the flock.