Great news about Cuddles. I had to enlarge your last picture, because the red thing on her hen saddle looked like the disposable meat thermometer on turkeys at Thanksgiving, LOL.
She may be having crop stasis or a slow crop due to her illness. Many illnesses can cause that, and it may appear to be sour crop, but isn't. If she isn't taking enough of the Corid, You can tube feed as suggested, and you can give some a couple of drops of undiluted Corid 2-3 times a day to...
Her droppings do appear to be abnormal, perhaps from an intestinal infection or she may be passing some egg material if she is having problems with her reproductive system, such as internal laying. Have you wormed the flock recently, and if so, what did you use? Many times will chicken illnesses...