Have you checked for any crop issues,such as an impact? If she was egg bound there would be no poop or watery poop,as egg binding interferes with the ability to poop.
It is possible she has had an injury,and pain might be the reason she is not eating. Explain wing is stiff and you cannot move...
first thing is you have to get some fluid/food into her ASAP,she will die of dehydration/starvation before we even get a chance to figure out was is wrong. I will post links in a few minutes for tube feeding.
https://www.backyardchickens.com/t/805728/go-team-tube-feeding
You can also use...