Thank you, there are some great thoughts. I just wasn't sure on what to do. I sectioned off part of the pen and its working great. Hope they can mingle soon.
I have 8 four month old chickens. 3 Americana, 2 cucko marans, 2 favorelle, and 1 wyandotte. They get along great with each other.
I have 5 newer chicks that are 7 weeks old. The size difference between them is unbelievable. The new ones are matching breeds if that makes a difference...