So found a chicken doing this today. My deicer in my waterer was unplugged so I figured maybe it was just dehydrated. I had to go to thanksgiving, but before I did brought it inside, gave it water, and some bread (all I had laying around). It did drink some and I figured it would be fine when I got home. So I get home and it is still laying on its side. It won't stand up. It looks a little more lively but it's legs just don't work. It doesn't seem to be one or the other. Neither work. So I don't think it's an injury. My wife said it had some watery diarrhea before I got home. Any ideas? My mind goes right to mareks but I don't know.