bumblefoot can be treated with effort, but at this stage it may have spread too much, especially if it's turning necrotic
"Soak the foot in warm water and Epsom salts. When the scab has softened, remove it to expose the pus-filled cavity. Flush the cavity with hydrogen peroxide to clean out the...
are you able to send a photo? what color is the knob? sounds potentially like a later stage of bumblefoot. were you able to stop the bleeding for the toe?
If you can get her up to VA I can take her, I have two coturnix hens so she’d have friends for the end of her life. I may be able to meet you partway? It’s a bit far unfortunately