I had to take one of my roosters out of the coop to address some frostbite. He was only out of the coop a couple days, but as i am trying to move him back in , he is going after the primary rooster (Boris). They have not had any previous issues as number 2 rooster (jenner) was raised as a chick around Boris. Ive brought Jenner out the last 2 days to the coop and have stayed there every second. I have had to grab and pick up one of them to keep them from attacking each other badly. Im thinking that i may need to put up some poutry fence inside the coop to try and transition jenner back into behaving the way he did afew days ago...any advice would be appreciated. Thanks, all!