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. I just started introducing them two days ago and it didn't go well. All the bigger chickens peck at them. I don't know what to do. Should I separate them longer or let them work it out.