Maybe so! Are you giving her a good course of vitamins with the cipro? Being able to uncurl toes seems like a good sign to me. Chickens can fake health when they are sick but not paralysis issues, that is for sure, an improvement.
It's hard to know if it is cancer. What is easier and most likely to improve the bird now, is vitamin supplements. In the link I gave you, it explains that the neurological symptoms your bird has could be malnutrition, toxicity/poisoning, vitamin deficiency. Malnutrition can be malabsorption...
I'm sorry about your girl! Here is a link that may give you insight on possible problems she may have. http://avianmedicine.net/content/uploads/2013/03/28.pdf Ask as many q's as you need to, we are here for you.