I've had the nesting box blocked off since I put my chicks out at 8 weeks as I didn't want them sleeping in there. Now that they're almost 18 weeks old, when should I open it up for them? Now, or when I find an egg somewhere? I know I have to open it during the day and close it at night to keep it clean. Anything else I need to know? The two that will let me pet them do dip down to the ground when I stroke their backs and their combs and wattles are bright red. Thanks for your input.