I've had a hen where I work that for the past week has been acting like she's lost her balance. Her head is very shakey and once in a while goes crazy like she can't stop moving it which causes her to fall forward and sometimes roll.. Today I found her laying on the ground with another hen picking on her, I thought she was dead. She did not open her eyes when I picked her up and she was limp. I took her and dipped her beak in water and she started to drink a bit and then woke up and drank quite a bit. She's still eating and I have now separated her from the others. I have been giving her vitamin E with selenium for the past week because I thought it might be wry neck, haven't noticed any improvements so far. I've also added acv to the water. I'll post a video of her soon so you can see exactly how she's acting. Any ideas of what it might be? If it's wry neck would I have seen any improvements by now?