I have a 1yo barred rock hen who has been perfectly normal, in fact even a little shy, up until yesterday mid-morning. She stopped hanging out with our old girl (6yo mixed breed hen) and simply stood stock still in the yard, staring at nothing for hours on end. She wouldn't come over when the girls got their afternoon treats either. I went over and picked her up with no fuss on her part. She seemed fine but even with putting the bread right in front of her she wasn't interested. I moved her nearer the gardens at which point she walked into the greenhouse, grabbed a drink and then stood there for over an hour. She did go into the coop on her own, as normal, but she didn't roost, she stayed on the straw with the ducks which IS odd for any of my chickens to do. This morning she came out, didn't eat and started the standing still and staring thing again. She isn't in any obvious distress, she has no runny eyes or nose, no cough, no wounds, just a bit listless. I don't want to do a full on vent check just yet (mostly for fear of accidentally introducing germs into her vent) but I did give her a long soak (15-20min) in a warm bath which she enjoyed, a blow dry with warm air and now have her sitting in the house in a little box where she is napping. I haven't been able to get her to eat or drink today, but my son took her onto his lap and got her to eat a little bread. She wakes up and is alert when she hears noise or when one of my cats decides to drink water from the chicken's dish. Should I be worried? Is there something else I should be doing for her? None of the rest of the flock is acting oddly (5 chicken hens, 11 duck hens, 4 duck drakes). No one is ill and we're just heading into Spring in North Eastern Pennsylvania.