I have 4 1/2 week old Golden comets in a tractor the week in and out made a small coop. They are next to my Buff Hens and Rooster. I went out and there was a couple out and I had to round up as we all know that is fun. They went right in to big coop ran right to the rooster and the hens come a running to see them. My hens are not mean but they did not like me trying to round up the babies. They all see each other every day. WOW they are brats. Great lesson though if you let them see each other at a young age the old like the new.