Found her yesterday morning in the rain and had been out all night. She is missing hand size area of feather on lower back. No scratches or wounds anywhere. One eye swollen shut but now more open. Dried her off and seperates her in garage with heat lamp. Every so often she looks up and seems to release some air, we can see steam, but no noises. There is a little blood around her head, but no visible wounds. She laid an egg this morning. Her poo's are a bit waterey but she is eating and drinking. Should I give her antibiotics or electrolytes? How long should I keep her quarantined? Is the open mouth thing normal? Thanks for any advice.
I would give an antibiotic -- and try again to find the source of the steam. I did a search for air sac puncture because that is what the escaping steam sounds like. There are lots of threads; here is one that gives a general idea: https://www.backyardchickens.com/t/422260/polish-rooster-with-a-punctured-back
