Swollen looking chiy

[DebraMarvinchicks]

I thought my chicken was egg bound and took steps to help her. She seemed better, but now moving slowly and swollen in breast area.
She is 4 years old, also looks like her bill, or beak is slowly getting darker.
Thank you for any help

 

[LaFleche]

She seems to be suffering from either crop impaction or sour crop
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/