I'm glad to hear that she has recovered enough for you to take the next step of re-integration. It may take a good while and some patience to get her back into the flock. There's always a possibility that she may never be accepted, but all you can do is take one day at a time and hope for the best. If you have space and time, letting them all out together with you monitoring them closely may or may not work. Chickens are hard to figure out at times. You may want to read the article that @azygous wrote about integrating a single hen. There may be some tips in there for you. http://www.backyardchickens.com/a/introducing-a-single-hen-to-an-existing-flock I hope everything goes smoothly and she is back with the others in no time. Thank you for the update and please let us know how it goes.