I'll make this as simple as I can. 3 Japanese hens with chicks in 3 stages. Tiny-only a few weeks old. Medium-a little older but a bit of baby coloring still. Pullets-teens and almost adult size. I wanted to know if I could add 4-5 unrelated Tiny chicks to this flock. The newbies are white Silkies, btw. Can I add them at night right away and they will be fine? Should I separate them in the coop with no run for a week or so, then let them with the Japs? I have NO idea what to do. Please help!