I recently had two silkies die and now I have another chicken that can't seem to move. She is eating and drinking but can't keep Jeramy up right. When I pick her up she holds one foot up to her chest with the other outstretched. I took her to the vets about 4 days ago and he could not see any injuries. Treated her for worms in case that was an issue. Seems more like a neurological issue to me. Any thoughts?