Hi
@Shali VanMeter 
Welcome To BYC
I'm sorry to hear about your hen.
Can you share a photo of how she sits/lays down?
Do you know what attacked her - raccoon, dog, other chickens, etc.?
For the eye, you can try rinsing it with saline to see if that may help her, she may have some dirt/debris or scratched it.
5days is a long time to be in shock. Sometime when a chicken is attacked they may suffer from nerve or internal damage, even if you don't find any external wounds or injuries. If you have vet care, that is always best.
Do the best you can to keep her hydrated, fluids first, then food. Being thin is concerning, so if she will eat the egg that's good. You can also try a little wet feed. Vitamins in the water may help give her a boost as well.
You can use rolled up towels to help keep her upright or if you have time to monitor her you can make her a sling to see how she does. Here's a few ideas below, just google "chicken sling" to find more.
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