Watch the girls, likely they are picking at the scabs making it hard for them to heal up.
You can try a No Pick ointment to see if that deters the ladies.
I had a rooster with a large comb like that, he had similar scabs, he'd stand still and let the girls pick his comb (one girl on each...
Not necessarily.
Without testing, you can't know for sure what is causing the swelling.
It's been going on for a while though. You could try a different medication to see if that makes a difference.
Sounds like you are doing what you can.
If she still seems a bit chilled, especially for night time, provide her with a heating pad set on low (covered with puppy pads or an old towel) to help her out a little.
See how the crop is in the morning, you may need to tube just a little warmed...
You can't see Depluming Mites, they live under the shaft of the feathers and feed off blood. Treatment with Ivermectin is needed in order to eliminate Depluming Mites.
Northern Fowl Mites, you should be able to I.D. within the coop at Night and on the birds.
Same with Lice, you should be...
Can your vet run a fecal float to see if she needs deworming?
I'd check her crop to make sure it's emptying overnight. If she's having a hard time picking up feed, look inside the beak for any lesions or canker.
The yellow urates along with the blood clots could indicate something going on...
Looks like Lice Nits.
The eggs are basically "glued" to the base of the feathers. Are you seeing actual crawling bugs or lice on the birds?
To help unglue to the Nits, you can apply some coconut oil and they will start to come off. Some people pluck the feathers, but if there's a lot of...
Can you look inside her beak for any lesions, canker or mucous?
She has some crusty material on her beak and face, is that stuck on food or mucous?
What's her crop like? Is it emptying overnight?
How's the ventilation in the coop?
When was her last egg?
Any lice/mites?
A video of her...
Does she have lice or mites?
Her eye is a bit sunken which may indicate some infection or conjunctivitis in the eye.
The facial swelling, it's hard to tell if it's from picking/scabbing, bugs or respiratory illness.
Clean/flush the eyes with saline, then put an ointment like Terramycin eye...
Hi, do you see worms in the poop?
Taking a sampling of poop to a vet to see if the birds need deworming is a very good idea.
In the UK, for Chickens, Levamisole or Flubendazole (Flubenvet) are commonly used to deworm. Iirc, Levamisole can be added to the water and Flubendazole (Flubenvet)...
Once a hen has been separated out from the flock, often it's a challenge to reintroduce them, they can be viewed as a newbie or intruder. Once she's better, try a see no touch method like caging her within the coop or run so they can become more familiar with one another. The Top Hen is doing...