I live in Georgia and we've been having temperaturea in the 30s and lower 20s which isn't really that cold. All of my 30 chickens seem fine except for one young hen. I can't remember her hatch date but she is several months old and has been fully feathered for some time. She is a game breed but I'm not certain what kind exactly. With the past few days being colder than normal, she has been walking around with her feathers fluffed up and making little chirp/trilling noises and visibly shivering. She also can be seen closing her eyes for a minute or so and a little lathargic. She's even allowed me to pick her up and handle her. Actually, she is perched on my lap right now which is unusual because none of my game breeds like being handled regardless of how much I try.
Anyway, I brought her inside last night for a moment and it seemed as if she was perfectly fine once she warmed up so I'm uncertain if she is sick of what? I plan to isolate her and put her on electrolytes to be safe but I was curious if anyone else may have some insight or a different opinion?