My 6 hens (5 Red Stars and 1 EE) turn 16 weeks today. I have two nest boxes in the coop and I stapled cardboard over the opening before I put the chickens in to keep them from getting all boogered up. When would be a good time to open them? Here is an older picture from when I moved them into the coop you can see the nest boxes on the right. Only wish the coop was still this clean.