I would also start some human B complex vitamins 1/2 tablet daily crushed into food or a little water, which may help her legs. You can separate the rooster completely by himself in a pen, until he gets a bit older and calms down some. They are really wild in their first year after maturing, and...
The calcium is a good idea, especially if she doesn’t lay today, or if the egg shell is soft. The rooster probably needs more hens, but you could also separate him.