Hi, new to this group not sure if I'm in the right area or not. But I currently have 5 hens and a rooster, the hens and rooster are about 1.5 years old. I am getting 10 new roosters from someone for free and they are about 6 months old. At least five of them will be dinner but I want to keep some as I am hatching eggs and expanding my flock. How do I go about introducing these roosters to my existing flock that has a rooster so that they don't kill each other?