attacking her. hurt her wing. trapped her in a corner.... i washed her face and she opened her eyes. she seems to be feeling better. she wont drink much and will only eat her meal worms... she stays right in the low box and doesn't try to get get out. i rescued her from a home that didn't interact with the chickens except to throw some food on the ground and gather eggs.so her and her sisters don't like or trust people. i did take her to the vet and they did see that her wing is hurt and put her on inflammatory's. also put her on an antibiotics just in case.
However she could be sick, and apparently injured. So yes you are correct keep her seperate. Reintroducing will be rough on her. If you can keep her seperate but within sight and hearing of the other chickens. That will make things easier on her later.