I recently posted a thread here about my flock being harassed by a hawk. Some have told me that free range flocks need the protection of a rooster and this makes sense to me. Being that we are starting over at a new house with no previously established birds I haven't got a mature rooster yet. Right now my flock consists of all 5 week old Dark Cornish that are 10 hens and 20 cockerels which I will butcher all between 12 and 20 weeks of age. Right now I'm holding off on free ranging until they get bigger and I get a rooster. My question is: Am I putting my cockerels in danger by introducing a mature, possibly aggressive, cock into the mix?