Do either of her hock joints look swollen? Mycoplasma synovitis can cause swollen ankles and hock joints. She could also have injured the foot. Can you place her back with her flock in her crate? It might be hard to reintegrate her back with her flock if she is kept away from them longer. Gout...
Do you see any bubbles in either eye or swelling around her eyes or her face? I would use a couple of drops of hydrogen peroxide into the ear canal, massage, and clean it out with QTips. Then apply a little plain Neosporin or generic ointment into the canal, daily.
You can also use Tiagard (Tiamulin, Denagard) to treat mycoplasma respiratory disease, and get it here:
https://www.amazon.com/Aurora-TiaGard-Concentrate-Generic-Denagard/dp/B0B4T4Y9B1
Dosage is 2 ml per quart of water for 5 days.
Mycoplasma or MG is a chronic respiratory disease. Symptoms of...
You can upload a video to YouTube or a similar site, and that usually works. Make it public. It sounds like she could be dealing with a riboflavin deficiency, but Mareks or an injury could also be the problem. Do you have a rooster or cockerel or hens that could have injured her? Rooster Booster...
She probably has a respiratory infection, but just to be safe I would repeat the SafeGuard for a total of 5 days at 0.23 ml (1/4 ml) per pound, in case of gapeworm or capillary worms. Do you see any bubbles or foam in the eye on the side of the snotty nostril? Have you added any new birds recently?
Can you look inside her beak for any yellow material on the tongue or inside the cheek or roof of beak, that may be canker (trichamoniasis) infection? That can smell rotten and grow in size to block the throat and spread to the esophagus, crop, and sinus. Take a picture if you find anything. I...
Since the others have probably already been exposed to what she may have, I would tend to let her out with her flock so that there is less stress. When they are separated for more than a couple of days, they can be bullied when they come back into the flock. She sounds like she may have a...
You can give her a human calcium tablet with vitamin d3 orally, or break a Tums in half and pop it into her beak. That might help if she is trying to lay an egg. If you have any Corid you could try treating for possible coccidiosis. Dosage is 2 tsp of the liquid per gallon of water for 5 days...
Feeling of it with clean hands may tell you. The longer pus remains in a chicken, the more firm and solid it becomes. I would check the roof of the beak, the choanal slit, daily and remove more if necessary. You can try pressing around the eye to express the softer pus. I have never done any...
The sitting on her hocks can be a symptom of vitamin B 2 (riboflavin) deficiency. I would give her half of a super b complex tablet which contains B 2 and other B vitamins daily into her beak or crushed into some food or scrambled egg.
I would not inject anything into the vent since that can push fecal bacteria up inside the oviduct. But just using the polysporin or honey on the outside will keep it moist and from drying out. Since there is damage and blood, I would not try pushing anything back in, but wait until swelling has...
Many times the state lab will send you a prepaid shipping label to send the body overnight by Fedex or UPS. If you talk to them and stress that it is a backyard bird, they might be able to help you.