How old are yours in the pics? Mine are still in the house, getting bigger by the hour! I've just got to move them out on to the porch brooder pen, but with temps down to 33 or so at night I just can't risk it. They are 4 weeks old now, but man are they big for their age!! They're not really "fighting" but every once in awhile I hear squaking and carrying on...I go over to the brooder box and all four just look up at me with this innocent look on their faces...aaack!!