That’s great news! Thank you for the update.
The fur loss and irritation on her chin can definitely be from formula remaining on the fur. I like to use a warm baby washcloth and wipe their face after eating. They seem to like the slow warm stroking over their mouth and eyes. Many times I’ve had a squirrel grab ahold of the washcloth and hang onto it pulling it close.
Drag sores are problematic for squirrels with any type of hind end paralysis. I think you should wipe the area several times a day with a mixture of diluted betadine. Add enough betadine to a 1/8cup of warm water so that it looks like strong tea. Use a cotton round to wipe the sore. You don’t have to rinse it as it isn’t sticky when it dries.
Is she on prednisone or gabapentin? I can’t remember.