Thanks Kiki for the lash egg link
@Gayle R463 I'm still not entirely sure if your hen was laying shell less eggs or lash eggs. If you google images of lash eggs, hopefully you will be able to clarify. The fact that your hen was eating them and had yellow on her beak suggests soft shelled or shell less eggs. Lash eggs are rubbery and look like layers of cooked egg and sausage meat and can be a variety of odd lumpy shapes. They are almost always solid (not runny) when you cut them open and I would not expect you to see yellow on their beak from eating them.
If she has been laying lash eggs, then that would confirm salpingitis and whilst it may respond to antibiotics if you catch it early enough, the likelihood is that there is a mass of egg matter inside her, clogging up her oviduct and probably causing a constriction of her gut, causing things to back up.
There is a common misconception with an impaction that it will feel hard and so far, all the impactions I have dealt with have been soft and pliable (doughy) but not sour crop. I have had to resort to surgery twice and whilst I did it unaided the second time, I very much doubt I would have managed to pull it off without someone to hold the bird the first time, so I can entirely understand your situation. Even with surgery, and I can tell you that my little pullet was far less traumatised by it than I was and made a miraculous recovery, I am starting to wonder if perhaps it is not necessarily the right thing to do. After removing a soft ball sized mass of soggy grass, my little girl went right back to filling herself up with more over the following months and we were then back to square one. Sometimes perhaps we have to overcome our human need to try to fix things and just let nature take it's course.
I'm sorry that I cannot offer anymore advice and just hope that you can make your hen comfortable during her final days.
Sending hugs
Barbara