I have succesfully hatched 8 leghorns and eventually I would not like to have them in the brooder in the livingroom of my house. The chicks have just hatched (ranging from day olds to 5 days old). These lovelies have been incubated and are currently in a brooder in the house. Eventually these babies will outgrow the brooder. When is a good time to start to introduce them to the great outdoors, especially in the winter climate? Any suggestions for pen configurations?