I have a purpose built shed 6 foot by 6 foot for my impending arrivals (due next week to hatch), can I put in new eggs straight away and transfer the chicks in again when they hatch? Is three weeks too much difference in age for the same coop? I can hang two heat lamps, and keep little chicks away from the bigger ones but want to avoid that if possible. I plan to let the chicks have the run of the shed by two weeks old anyway. So, they'll be five weeks and two weeks. The brooder I have is only three and a half feet by one and a half. And at what age can I let them outside for a couple of hours when it's dry and warm?