I'm going to tag in @Eggcessive and @azygous to help take a look at the scabs/lumps.
The poop has a lot of urates and doesn't look very good.
Have you ever treated for Coccidiosis?
Can you get a photo of her poop and of the preening gland too?
I'm sorry that Chloe is not doing well.
From what I can see in the photo, she likely has an impacted feather follicle and/or infected wound from being pecked.
Vet care, if an option, is always best.
If she were mine, I would...