Do I need a lid right away or can it wait a few days? I think I read that they won't be able to launch themselves out for the first week or so? Is this a safe bet? If I get any to hatch I intend to turn my laundry bin (a plastic storage container) into the brooder. Will make appropriate roof now if necesary but would rather wait, see if they hatch and just clamp the heat lamp to the top and leave the top open for a coupla days till I can make something better.