I don't know what's going on here, I assume maybe it's a sudden illness or something. Last Friday I noticed one of my hens wouldn't come to eat, in fact it seemed like she might not have for a few days at least. She did come to drink when I refilled the water dish on Friday. But still wouldn't eat, and she seemed like she was really sluggish and kinda weak, she took a super runny poop, it was like yellow water. I had a rooster die a week or 2 ago not sure if it was under the same thing or not, it had trouble walking/standing (it actually had trouble with walking and standing for a few weeks), it ate some but was eating less, it went outside and I assume went hypothermic cause it was very wet and snowy, I found it out there barely alive, I brought it inside and next day it was dead. And yesterday I noticed another rooster was unable to stand, and refused to eat or drink... today it died. What on earth is this? And how do I put a stop to it? I can't keep losing birds.