My chicken has stopped walking :(

[puffthechicken]

My one year old orpington has always had walking difficulties for as long as i can remember, and lately its only been getting worse. She used to limp a bit, but now shes mostly sitting down, and im scared it'll get to the stage where she will just sit on the ground the entire day. She can still stand up and briefly walk - for now. Still eating and drinking. She is the only one in the flock with this problem. I would be extremely grateful for any help, advice or treatment suggestions - i havent had good experiences with vets and chickens, and i know you guys have better advice anyways.
Thank you so much <3

 

[BlueBaby]

Have you checked the bottom of her feet to see if she might have brumble foot?

 

[puffthechicken]

i have, she doesnt. i think it might be something to do with her bones