When can you move the chicks to their coop? They are going to be 3 weeks by the end of the week and it is in the high 70s -80 this week and probably going to be staying warm here since I live in Ga. maybe down into high 50s at pm . I could move a heat lamp out if needed. I have 12 btw. They are quickly outgrowing their brooder even though it's a large crate.