Southern Flying Squirrels

Question
How long do you have to feed them milk?

Answer
I really don't know much about flying squirrels, but I would assume that just like anything else, feed them milk until they start eating dry food.  Offer them dry or 'hard' food on a daily basis and when you see them eating it, you can most likely stop the milk. Make sure they start refusing the bottle, though.  Good luck!