I have 4 chickens and made 2 nesting boxes elevated off the ground and have a roosting bar in my coop also. I see people on here saying cover the nesting box till the chickens are ready to lay. Is his true? Shlukd I block them off? Also my 4 baby chickens will be sharing a cool with 4 baby ducks once both are older. I plan on keeping all good and water outside.