Hi I was wondering when I should move my chicks to the coop. I have them in their brooder in my basement right now and they are three weeks old. I live in south central pa and it is still pretty cold( temps high in the 40s) They have alot of their feathers. I have 4 rirs and 4 red stars. I guess my question is how many weeks old is ok to move them outside? And what's should the temps be?