I have four older hens that have quit laying. I'm not for sure how old they are. I'm their third owner and I know my uncle had them for around 2 years I've had them for about one. They slowed down through the winter but have not laid any eggs for I think 3 months. They were all locked up for the winter but towards the end I let them start free ranging again. I put the four in a coop with a run about a week ago to see if they were laying and just hiding them. They have not laid any all week. They are not missing any feathers and act normal. I was wondering if it is because they are older but I dont want to cull them if there is a chance they'll start laying again.