HI! I am new here and looking to raise chickens for eggs. I have a partially underground horse barn (stays above 20 degrees all winter) and I am in the process of knocking out a wall between two stalls and making it into a coop. There is also an attached outdoor ring that I am fencing and putting a net over. My question is: Should I order/buy chicks to raise or should I get some a few weeks old already?