I would be tempted to leave the screws in there, since many chickens swallow hardware, because it sounds like fairly invasive surgery to remove them. Please don’t follow my advice though, but make up your own mind. However, I would let the vet set the leg and splint it.
This is a good link below, about making a chicken sling. Those can help get them upright and keep them cleaner, while letting the leg heal. Food and water can be placed in front. They can be taken out for periods of rest and at night to sleep. Let us know how the vet appointment goes. Here is...
I hope that splinting the leg and having her rest it will hopefully help it heal. It is hard to know how they will do with such a serious injury, but it is worth a try to save her. The nerve involvement is a huge complication, and it could be that she will not recover the feeling or ability to...
This splinting manual has a lot of info about bone fractures and injuries, and how some are treated or splinted. It might be some good reading to learn about the probability of her recovering from the injury:
https://theiwrc.org/wp-content/uploads/2011/05/Duerr_Splinting_Manual_2010.pdf
I am...
Sorry about your hen. It does look badly broken. I would probably have had it splinted as well. You can take her home and think about how to proceed. I do not know if she can get over this, but you could see how it goes with splinting and rest. Someone else who has treated a broken leg might be...
Do you suspect a fracture, or could there be Mareks disease or a vitamin B2 (riboflavin) deficiency? Why do they want to amputate? Chickens do not tolerate anesthesia well.
We would need to see some pictures and have more information to offer help. What happened to the leg? I certainly cannot afford to pay a vet $3000 for amputation or any vet care. I would be tempted to go home and try to treat it myself.