Help diagnosing sick chicken!

Hi there,

I found some green droppings that have been in my chicken coop for the last two days. I found out today who it was as the poor girl is puffing up a lot and is lethargic. I started her out with an Epsom salt bath while I did some research. I observed her crop was quite hard and started to massage the area while I put her into a brooder for some isolation. It did seem like I helped some stuff move along since her crop is no longer hard, and she has since had some more green droppings but is still puffed up.

I am not so sure she has sour crop after all if she is able to pass droppings? .I am not sure what to do at this point but am concerned she is in trouble - any help would be much appreciated! I don't want to lose her :(.