Very lethargic hen, green poop. help!

[sunshinesnuggles]

My Easter Egger is very very lethargic. She turns four in two months, and she hasn't laid since probably early fall, but she is older. She had similar but less mild symptoms a few weeks ago but seemed to recover on her own. Now she just lies down in the run, and she's getting worse. She can walk, she just has no energy. She has been in the nesting box a bit so she might be egg bound? I just gave her a soak. She took some food when I gave it to her, but she may not be eating on her own because she has such little energy. I also found some greenish poop dried on her bum, not watery but definitely off color. I'll attach a picture. The other hens are completely fine.
Please help! I can answer any questions. She's drying off from the soak right now and almost falling asleep. I'm going to give her some pellet mash to try and get some food in her.

 

[sunshinesnuggles]

update: gave her and the others some mash, she ate a bit. I tried to force her to drink like you do with baby chicks when you first get them, but she wouldn't open her mouth so I didn't get a ton in. the mash is wet though. she was falling asleep so I set her in a nesting box so she could rest. I'll have her eat some more later. is there anything else I can do?