I am very NEW to squirrels and very new to MBD so I would read the threads on MBD and rely on the senior members for advice. BUT BUT BUT, in my opinion, they can NEVER be released. If a squirrel is paralyzed, they have NO chance whatsoever of making it outside of a controlled environment. How could they? What you re doing is absolutely wonderful for Winnie....you are her guardian angel. If you cannot keep Winnie, let someone know and a rehabber in your area can be found.
Jackie in Tampa has a paralyzed squirrel also and others on here are a wealth of information and help. I spent days, and still do, reading all I can on paralyzed squirrels and squirrels in general. It's a lot to take in, at least for me. Don't be afraid to ask for help and remember, there are no "stupid" questions.....ever. Sounds like you are doing a lot of correct things for Winnie. In fact, I bought some cream this morning just in case she develops sores! Thank you for that piece of info!