I did forget to mention when penning cocks keep the hens out of sight or they will fight. Group them by age is best. I routinely pen the cocks over winter together but they have an established pecking order already because I free range them prior to penning. A hen with them will result in a fight.I have re-penned successfully but you need to consider the circumstances. I will repen at night, in a new area for all birds, and pen them VERY close together for a day, then extend their area. The shock of being moved...to a new spot....and close confinement....seems to foster more tolerance.