Your problem may be long term, not just a re-entry issue.
I had an EE hen who developed a problem with her leg. Early on I didn't even notice anything, but the flock did. When they began tormenting her was when I noticed she was having trouble walking and hopping up steps. Over the next two years, her leg became steadily worse, and eventually she was no longer able to get around.
As her leg became worse, so did the bullying by the flock. I had to segregate her in her own pen, and when the flock would no longer allow her to roost in the coop, I had to provide a bed for her in the garage, and the warmer garage seemed to help with her pain and she was more mobile. During the summer, I rigged up a crate in her pen in the run and she laid her eggs there as well as slept in it at night.
The flock flat out refused to accept her after she began to go lame, and that seems to be the way of chickens. They are extremely hard on any chicken who displays any sort of physical infirmity.
One thing you might try is baby aspirin to help relieve any pain your hen might be experiencing. That helped with my hen for a couple years, and she was able to get around a lot better because her pain was being managed. I gave her half a baby aspirin twice a day. I even gave her a quarter tab of glucosamine each day, which also probably helped extend her days of getting round normally.