lethargic, weak chicken

hello! we are looking for some help on one of our chickens, if anyone has the knowledge. can anyone provide any kind of help? is she a lost cause, are we are delaying her death? be kind, please, our layers are not like our broilers - they are our pets

on wednesday, my parents found one of their hens wrapped up in some netting in their horse barn. we are estimating that she had been trapped out there for 1.5-2 full days, as she was swamped in her own feces and severely dehydrated.

yesterday (friday) i came over after work and we did some research on how to bring her back to full health. last night we observed that she had no movement in her right claw, and minimal movement in her wings. we moved her to a warm, dark space separate from the other chickens, with a heat lamp and fresh pine shavings as well as a towel for upright support. she was extremely lethargic with no strength, and very light in weight. we gave her 10ml of water mixed with egg yolk + a small amount of salt for calories/electrolytes via a dropper.

between then and now, she has been checked on every couple of hours. tonight she is able to move her wings, but still not her right claw - though she is able to move the leg itself. i'm not sure how to add videos here but i did attach two pictures. questions? suggestions? pointers?