There is no vaccine to protect against botulism. Botulism is more common in ducks, but they get it from eating dead animal remains, rotten vegetation, or maggots that have been without oxygen either buried or under water. I kind of doubt that she had that since she would not have been able to stand at all even with help. It causes flaccid paralysis starting at the feet spreading up the spinal nerves to the wings, neck, and eyelids. There could have been some other neurological problem, dehdydration, mold poisoning, or toxin, but most times we don’t get answers unless there is a necropsy after death. Hopefully, she will get back to normal soon. I would give her some form of chicken vitamins or human B complex for riboflavin.