I have a barred rock hen that is @ 8 mo. old. she is keeping her left eye closed and acting like she doesn't feel well. She got broody a couple of weeks ago (her and another hen) and finally came off the nest. She hasn't laid since. She seems lethargic and has lost weight. I had all of them on "Rooster Booster" and took them off because a couple of them had runny stools and I wanted to see if that was the cause, or if they had other parasites. I checked her abdomen for an egg and there wasn't one. I have separated her and am giving her vitamins and electrolytes. She's eating and drinking. Her stool looks normal one minute and then runny the next. What to do??