Just a quick question . . . Our chicks will be 7 weeks old and are doing very well. Lots and lots of feathers, but not fully feathered out yet. At what point can they go outside and stay there. They will of course have access to the coop all day and would be locked in at night. We have 3 Buff Orps and 2 white Plymouth Rocks.....the Buffs are bigger then the other two yet they were all supposed to be hatched on the same day. I thought they were around the same size!