I have a hen, about 8 months old, that has been pretty inactive and to herself for about 6 days. Not wanting to eat, drinks a little bit of water and just sleeps all day. Her poop has been pretty runny (no blood). I’ve had her separated since Friday from the rest of the flock. I’ve been giving her poultry cell for the last 4 days and still no big improvement. Any ideas what this could be?