I have a rooster who is terrorizing the barn yard. He is the first one into the chicken coop at night & I swear I heard him growl last night. He was patrolling the floor and every time a chicken would try to go into the coop he would growl and chase them out. Is he really growling? I can't get my chickens in the coop & it is in the 30's at night so I want them inside. They want to stay in the run, which is covered, but I don't think it is good for them. Any thoughts or suggestions?