Thats good to hear. But can she move her legs? I can't help you with antibiotics but for sure someone else can. Wish your hen luck
@Eggcessive
Well it has been nine days since I last reported, but it is all good news. Sesame seems to have completely recovered.

Here's the story - Our flock comes up by our deck and porch when we let them out to forage, and Sesame seemed to do better when she could hear and see her flock. The first day before she could walk we put her out on the porch, she sat there and the hens would periodically come up and visit with her. So the next day, I carried her down the porch stairs and put he in the grass by the little water pool to spend time with the flock while they foraged. She ate better and drank more with out coaxing and it appeared that she pushed herself to walk and get better. Each day she got better at walking and standing for longer and longer periods. On the 18th we put her in the coop at night with her flock and she did fine. The first few days, I did notice that she walked almost normal early in the day, and by later in the afternoon she began to limp and rest more. And the whole flock rested along side her. She is their leader for sure. But now I am not noticing any limp.
For anyone reading this, I really believe that reintroducing her to the flock as soon as possible is what helped. And I believe it has helped the flock as well. Remember, the day before she fell ill, one of their flock dropped dead.
Having had a sick convalescent chicken and rooster before, isolation seems to lead to depression very quickly, they don't seem to want to eat or drink much like when they go broody, and they don't seem to recover as quickly.
I have 5 surviving hens and today is the first day since this began that I got two eggs. For the first few days no one laid, then I was getting one a day. I know that the other younger Australorp began molting a few days after Sesame rejoined the flock. Teriyaki, the other Australorp who has been with her since they were chicks hasn't laid and her behavior seems a bit off.
All these reactions seem reasonable and normal, are they? Anyone?