Thanks for your reply. My older chickens are four years old and laying. We added the new flock after a quarantine period, and they were introduced gradually.The coop is 10' by 9',with a ladder perch, nesting boxes and plenty of room.I have two feeders and waterers and veggie snacks daily. I give them free range time twice a day, and that helps. They all seem okay except for one which I separated for now. She is eating and drinking, but she got eggbound a few times, so I was concerned that she was stressed. I think that she will be ready to re- join the flock in a week or so.