I have a two month old Americana chick that has lost its ability to stand or walk seemingly overnight. I saw her walking and running around yesterday and today when I woke up she can not stand up and pushes her legs on the grounds to shove her body along. If you try to stand her up she falls over automatically. If you hold her up in the air then she flaps her legs around. She has walked fine for her whole life this is a totally new thing! The other chick that is being raised with her is perfectly fine. What should I do? I have been told to put nutrient drench in her water but other than that is there anything I can do? What is going on?