I had a chicken, 4 week old Australorp acting strange yesterday so we seperated her from the rest of the flock. She was tucking her head under her chest and falling over. I gave her vitamins and hand fed her all day, making sure she drank plenty of water. Today she is acting perfectly normal, eating, drinking, and pooping normal. How long should I wait before re-introducing her to the rest of the flock? What's the best way to do it?