Hi. So my buff orpington hen is almost a year old. She was laying one egg a day very regularly, until a couple months ago. At that time, I introduced two new young hens (plymouth rock and welsummer) into her coop. They weren't ready to eat layer feed yet so I had them all on the chick feed. About a week later, my grown hen stopped laying. A few weeks after that I switched them all to the layer feed. The older hen still hasn't started laying again. It's been at least a month since they've been on the layer feed. Is this normal? She also has been fighting with the plymouth rock quite a bit. Could the stress of that affect her laying? Any advice would be much appreciated! I am started to worry about her! THANK YOU!