I have 8 speckled Sussex that are 8 weeks old in my coop and in a seperate grow pen sharing a wire wall I have 5 blue splash marans that are 4.5 weeks. The splash’s are growing quick but are still only about half the size of the Sussex. What is the best age to incorporate into one coop and any suggestions? I let them out for a bit supervised last night in a 8x16 run and there was a little pecking but the splashes were super sacred and frantic to get back in their pen.