One of our Rhode Island Reds is acting sick. Her tail seems to not be standing straight up and she stands hunched over and her eyes seem to try to fall asleep sometimes when she's standing. Her poop seems watery and not much coming out, her rear end (I think it's correctly called a vent) is WHITE. I bought her some electrolytes and probiotics at Tractor Supply. She seems a little better, but was just wondering what might be wrong.