White legs

[Wyorp Rock]

When she tries to walk it almost seems like her head's too heavy and she falls right into her head . when she falls over it seems as though that her legs shake a little .I dusted her Her vent in all underneath her feathers. And also where she's laying. I tried to let her out to walk around a bit to get a better video but the other girls want to just kill her.

I'm sorry, it sounds like she is not doing well at all.
What type of dust are you using to the the lice/mites?
Have you been able to monitor her to see if she is eating/drinking well?

It's hard to know what's going on with her. It sounds like she was being picked on by the others and possibly overmated. Maybe even to the point of not eating well.
Do you know when she last laid an egg? Feel her abdomen for any bloat/swelling or feeling of fluid and check her crop to see if it's emptying overnight.
If you have a vet that can check her over, that would be good.

Give her a few days to see if she will rally since you are treating her form the lice/mites, hopefully with a Permethrin based poultry dust. After that, if she does not seem to improve and begin to eat and drink, then she may just be shutting down. As hens get older, there are quite a few things that can start to happen with them.

Let us know how she is.