Still no idea what’s going on with my hens comb and growing black spots

[Ohsrsly]

Molting first usually happens in a chicken's second autumn and each thereafter. However that is when the chicks hatch in spring and summer. A December hatched chicken will often molt in the first autumn. When a bird molts, you will see a lot of feathers like someone had a pillow fight in the coop and run.
Molting almost always stops egg production. It is hard to build a new winter coat made of 92% protein while kicking out a lump of protein every day.
With egg binding they usually make frequent unsuccessful trips to the nest box. The vent will often pulse relentlessly.
What state are you in?

I am in northwestern Tennessee.

She made one trip to the nest box about 5 days ago and did not lay, which is pretty normal for her- she often sits, doesn’t lay, and then lays two the next day often by “surprise” out in the run or while roosting. But she hasn’t been back to the nest box that I know of in 5 days. She’s kind of just huddling in a corner unless I come out with scratch grains. I do see her visiting the waterer.

 

[Eggcessive]

Mine usually have molted around 18 months old and yearly thereafter. But some have their own schedule. Some molt gradually where I have only noticed some missing tail feathers, while others lose those and big patches on the neck and elsewhere. You can check her crop in early morning to see if it has emptied overnight, and look her over for any lice or mites on her skin. Crop problems, parasites, and worms could cause her to be less active and not eat as well.