first time chicken owner. we have 4 hens. we have a coop that has 3 nesting boxes inside. then attached we built a big run for them to have more space along with letting them free range everyday for a few hours. they always sleep huddled together in the back corner of the coop in the far right nesting box.. also the only square/box they have started to lay their eggs in. there are two roosting bars inside along with one outside. everyone knows how much chickens poop so need any tips/advice to get them to stop sleeping/going the bathroom where they lay their eggs. we are open to adding onto the coop or any reconstruction needed. they are 4 1/2 months old