Oh man, definitely hoping not to have to do crop surgery, that definitely sounds intimidating / something I'd rather not have to do but I'm open to whatever needs to be done. Was it a sour crop for your girl by this point? Thank you for the resource!
No, none of mine have gone sour even when they had been impacted for more than 2 weeks. The one I did surgery on, I removed a soft ball sized mass of soggy tangled vegetation which had clearly been there for a long time, but it didn't smell bad at all. It was just plugging the outlet from the crop and preventing food and fluids passing down into her system. It felt soft and squishy. The others I had were also quite soft so I assume they were also soggy vegetation. One was like putty that you could feel hold the shape you squeezed it into until you squeezed it again if that makes sense. Many people assume if it is squishy that it is sour but that is not the case in my experience. The smell will tell you if it is sour.