They turned 20 weeks old today and still not laid a single egg. I feed them growers pellets(which has 18g protein) and oyster shells (that I don't see them eat it) and I let them free range all day long utill night and our backyard is full of crickets and insects. One thing I'm concerned about is the coop. It's pretty small (originally a dog small house) which they don't sleep in anymore, they like to stand on the backyard stairs at night (because it's high) and I have to carry them to their coop. Could that be stressing them out? Please help with any good ideas. Should I build a run so they can sleep on a high place such as piece of wood (which they seems to like).