It sounds like she is moulting. Are the stalks you mention not pin feathers coming in. Try searching for pictures of moulting chickens and that might set your mind at rest. It is the right time of year for it to happen and I understand your concern regarding the cold but I've had a chicken moult in the middle of winter and she was fine. It takes time to grow new feathers and they look almost like porcupine quills when they first come in.
There is a thread on here somewhere which is a competition for the worse moulting chicken picture....I'll see if I can find it and then perhaps you will be able to figure out if that's what is happening to her.
This is a link for an old thread for a moult competition...I couldn't find the current one for some reason
https://www.backyardchickens.com/t/...-chicken-molt-pictures-fall-winter-2011-ended
Have a good look at all the photos and tell us if your girl is suffering the same fate...
There is a thread on here somewhere which is a competition for the worse moulting chicken picture....I'll see if I can find it and then perhaps you will be able to figure out if that's what is happening to her.
This is a link for an old thread for a moult competition...I couldn't find the current one for some reason
https://www.backyardchickens.com/t/...-chicken-molt-pictures-fall-winter-2011-ended
Have a good look at all the photos and tell us if your girl is suffering the same fate...
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