I think that you are correct. I had a rooster for a year and recently got rid of him as he was so hard on 2 of my hens that I thought that he might kill them. I had 4 hens and 2 were fine with him and 2 he just didn't like and made life miserable for. And I loved him. He was like a dog with me, friendly, followed me around. He was a white crested blue polish. And he did alert me a few times to predators and fought with a crow once!. Well, a few days ago I heard the hens making a bunch of noise and ran to them and I saw one bobcat run up the hill behind the house and a smaller one by the coop. When I got to the coop, one of my ladies had been killed. I was so sad. And the bobcats have been returning regularly since. So they cannot roam anymore. I do have a large run attached to the coop and they are just staying in there now. I wonder if my hen would be alive if I still had my rooster Moe.