Thanks alot,the site was really helpfulIt does sound like she is broody, but you mention leg weakness. What condition is she in? Is she normally active/eats/drinks and moves around a lot?
How old is she?
Any external parasites?
She is a lone hen? Do you have room for more chickens if you were to give her hatching/fertilized eggs? If you don't have room for more/don't want more or if the hen is not in good physical condition to sit for 21 days, then I would break her broodiness.
I will remove her bedding tomorrow and then let's hope for good results