I hope someone can help. One of my 3-month old hens suddenly couldn't walk. She can't manage to get out of the pen to eat and drink, She eats well when I take food to her so she has a good appetite. I have started some vitamins but her toes are all curled up and every thing was stiff. She is eating and drinking as long as I put it near her. Her feet are still curled up and can only stand on one leg. Any suggestions?